diff --git a/include/sntl/sntllv2.h b/include/sntl/sntllv2.h
index 508bd05..4cfa653 100644
--- a/include/sntl/sntllv2.h
+++ b/include/sntl/sntllv2.h
@@ -231,6 +231,7 @@ int sxmsg_reply_pp(sxmsg_t *msg, const char *data, size_t datalen);
 int sxmsg_rreply(sxmsg_t *msg, size_t datalen);
 int sxmsg_return(sxmsg_t *msg, int opcode);
 int sxmsg_return_pp(sxmsg_t *msg, int opcode);
+void sxmsg_clean(sxmsg_t *msg);
 
 #ifdef __cplusplus
 }
@@ -261,6 +262,8 @@ int sntl_rpclist_filter(usrtc_t *source, usrtc_t **dest, int flag, int *filter);
 
 #define blub(txt)  fprintf(stderr, "%s:%d in %s > %s\n", __FILE__, __LINE__, __FUNCTION__, txt)
 
+#define dumphead(head) fprintf(stderr, "id: %d, opcode: %d, attr: %d, len = %d\n", head->msgid, head->opcode, head->attr, head->payload_length)
+
 #endif /* __SNTL_SNTLLV2_H__ */
 
 
diff --git a/lib/chansx.c b/lib/chansx.c
index cc2df7e..f0e9fdb 100644
--- a/lib/chansx.c
+++ b/lib/chansx.c
@@ -46,14 +46,14 @@
 uint8_t _channel_open(conn_t *co, uint16_t *chid)
 {
   chnl_t *chan;
-  uint16_t typeid = *chid; /* our type */
+  int typeid = *chid; /* our type */
   uint16_t chidx;
   usrtc_t *rpc_list = co->rpc_list;
   usrtc_node_t *node;
   rpc_typed_list_t *rlist;
   cx_rpc_list_t *rpclist;
 
-  node = usrtc_lookup(rpc_list, (void *)&typeid);
+  node = usrtc_lookup(rpc_list, &typeid);
   if(!node) return SNE_EPERM;
   else rlist = (rpc_typed_list_t *)usrtc_node_getdata(node);
 
@@ -87,6 +87,7 @@ uint8_t _channel_open(conn_t *co, uint16_t *chid)
 uint8_t _channel_close(conn_t *co, uint16_t chid)
 {
   chnl_t *chan;
+  ulong_t chidx = chid;
 
   if(chid > 512) return SNE_INVALINDEX;
   else chan = co->channels[chid];
@@ -94,8 +95,8 @@ uint8_t _channel_close(conn_t *co, uint16_t chid)
   if(!chan) return SNE_NOSUCHCHAN;
 
   pthread_mutex_lock(&co->idx_ch_lock);
-  idx_free(&co->idx_ch, chid);
-  co->channels[chid] = NULL;
+  idx_free(&co->idx_ch, chidx);
+  co->channels[chidx] = NULL;
   pthread_mutex_unlock(&co->idx_ch_lock);
 
   free(chan);
@@ -117,6 +118,7 @@ chnl_t *sxchannel_open(conn_t *co, int type)
 
   if(!(chan = malloc(sizeof(chnl_t)))) {
   __enomem:
+    if(chan) free(chan);
     r = SNE_ENOMEM;
     goto __reterr;
   }
@@ -146,6 +148,7 @@ chnl_t *sxchannel_open(conn_t *co, int type)
   pthread_mutex_unlock(&co->idx_msg_lock);
 
   if(msgidx == IDX_INVAL) {    r = SNE_MMESSAGES;    goto __reterr2;  }
+  else head->msgid = msgidx;
 
   /* now we're ready to write it */
   r = _sntll_writemsg(co, msg);
@@ -156,13 +159,15 @@ chnl_t *sxchannel_open(conn_t *co, int type)
   if(msg->mhead.opcode != SNE_SUCCESS) { r = msg->mhead.opcode; goto __reterr3;  }
 
   /* ok all is fine */
+  msgidx = msg->mhead.reserve;
   chan->cid = msg->mhead.reserve;
   pthread_mutex_lock(&co->idx_ch_lock);
-  idx_reserve(&co->idx_ch, msg->mhead.reserve);
-  co->channels[msg->mhead.reserve] = chan;
+  idx_reserve(&co->idx_ch, msgidx);
+  co->channels[msgidx] = chan;
   pthread_mutex_unlock(&co->idx_ch_lock);
 
   /* destroy a message */
+  msgidx = head->msgid;
   pthread_mutex_lock(&co->idx_msg_lock);
   idx_free(&co->idx_msg, msgidx);
   co->messages[msgidx] = NULL;
@@ -196,7 +201,7 @@ int sxchannel_close(chnl_t *channel)
   sxmsg_t *msg;
   sntllv2_head_t *head;
   conn_t *co;
-  int msgidx;
+  int msgidx, chidx;
 
   /* check channel validity */
   if(!channel) return SNE_FAILED;
@@ -231,9 +236,10 @@ int sxchannel_close(chnl_t *channel)
     r = head->opcode;
 
     /* we will free this anyway */
+    chidx = channel->cid;
     pthread_mutex_lock(&co->idx_ch_lock);
-    idx_free(&co->idx_ch, channel->cid);
-    co->channels[channel->cid] = NULL;
+    idx_free(&co->idx_ch, chidx);
+    co->channels[chidx] = NULL;
     pthread_mutex_unlock(&co->idx_ch_lock);
     free(channel);
   }
diff --git a/lib/messagesx.c b/lib/messagesx.c
index 213af6b..03ba12c 100644
--- a/lib/messagesx.c
+++ b/lib/messagesx.c
@@ -325,3 +325,9 @@ int sxmsg_return_pp(sxmsg_t *msg, int opcode)
   return __sxmsg_return(msg, opcode, 1);
 }
 
+void sxmsg_clean(sxmsg_t *msg)
+{
+  free(msg->payload);
+  free(msg);
+  return;
+}
diff --git a/lib/sntllv2.c b/lib/sntllv2.c
index 42fa773..68113df 100644
--- a/lib/sntllv2.c
+++ b/lib/sntllv2.c
@@ -203,7 +203,7 @@ int _sntll_writemsg(conn_t *co, sxmsg_t *msg)
   if(head->payload_length && !msg->payload) return SNE_FAILED;
 
   /* write the head and payload if applicable */
-  pthread_mutex_lock(&co->sslinout[2]);
+  pthread_mutex_lock(&co->sslinout[1]);
   rd = __conn_write(co, head, sizeof(sntllv2_head_t));
   if(rd < 0) {
     co->flags |= SNSX_CLOSED;
@@ -213,7 +213,7 @@ int _sntll_writemsg(conn_t *co, sxmsg_t *msg)
     /* check up again */
     if(rd < 0) {      co->flags |= SNSX_CLOSED;      r = SNE_ESSL;    }
   }
-  pthread_mutex_unlock(&co->sslinout[2]);
+  pthread_mutex_unlock(&co->sslinout[1]);
 
   if(!(co->flags & SNSX_CLOSED)) r = SNE_SUCCESS;
 
@@ -359,6 +359,8 @@ static int __connection_second_alloc(conn_t *co)
 {
   usrtc_node_init(&co->csnode, co);
 
+  memset(&co->idx_ch, 0, sizeof(idx_allocator_t));
+  memset(&co->idx_msg, 0, sizeof(idx_allocator_t));
   if((idx_allocator_init(&co->idx_ch, 512, 0))) goto __fail;
   if((idx_allocator_init(&co->idx_msg, 1024, 0))) goto __fail;
 
@@ -447,6 +449,7 @@ static void *__sntll_thread(void *b)
   pthread_t self = pthread_self();
   int dispatch = 0;
   size_t rd, wr;
+  ulong_t mid;
 
   /* byte buffer is following head */
   bbuf += sizeof(sntllv2_head_t);
@@ -472,8 +475,15 @@ static void *__sntll_thread(void *b)
   while(1) {
   __again:
     pthread_mutex_lock(&(co->sslinout[0]));
+    if(co->flags & SNSX_CLOSED) {
+      pthread_mutex_unlock(&(co->sslinout[0]));
+      goto __finish;
+    }
     rd = __conn_read(co, mhead, sizeof(sntllv2_head_t));
-    if(rd != sizeof(sntllv2_bundle_t)) {
+#ifdef _VERBOSE_DEBUG
+    dumphead(mhead);
+#endif
+    if(rd != sizeof(sntllv2_head_t)) {
     __sslproto_error:
       co->flags |= SNSX_CLOSED;
       pthread_mutex_unlock(&(co->sslinout[0]));
@@ -530,7 +540,8 @@ static void *__sntll_thread(void *b)
             fprintf(stderr, "[sntllv2] Invalid index of the message.\n");
             goto __again;
           }
-          msg = co->messages[mhead->msgid];
+          mid = mhead->msgid;
+          msg = co->messages[mid];
           if(!msg) goto __inval_idx_nor;
 
           /* ok now we'are copy data and unlock wait mutex */
@@ -580,10 +591,11 @@ static void *__sntll_thread(void *b)
             if(mhead->payload_length) msg->payload = bbuf;
           }
 
-          pthread_mutex_lock(&co->idx_ch_lock);
-          idx_reserve(&co->idx_ch, mhead->msgid);
+          mid = mhead->msgid;
+          pthread_mutex_lock(&co->idx_msg_lock);
+          idx_reserve(&co->idx_msg, mid);
           co->messages[mhead->msgid] = msg;
-          pthread_mutex_unlock(&co->idx_ch_lock);
+          pthread_mutex_unlock(&co->idx_msg_lock);
 
           /* now we are able to process the message */
           _message_process(msg);
@@ -594,10 +606,10 @@ static void *__sntll_thread(void *b)
           if(!msg) goto __inval_idx_nor;
 
           /* message dialog is closed - remove this right now */
-          pthread_mutex_lock(&co->idx_ch_lock);
-          idx_free(&co->idx_ch, mhead->msgid);
+          pthread_mutex_lock(&co->idx_msg_lock);
+          idx_free(&co->idx_msg, mhead->msgid);
           co->messages[mhead->msgid] = NULL;
-          pthread_mutex_unlock(&co->idx_ch_lock);
+          pthread_mutex_unlock(&co->idx_msg_lock);
 
           if(msg->mhead.attr & SXMSG_TIMEDOUT) { /* nobody wait for it */
             /* now just free it */
@@ -622,10 +634,10 @@ static void *__sntll_thread(void *b)
           if(!msg) goto __inval_idx_nor;
 
           if(msg->mhead.attr & SXMSG_TIMEDOUT) { /* nobody wait for it */
-            pthread_mutex_lock(&co->idx_ch_lock);
-            idx_free(&co->idx_ch, mhead->msgid);
+            pthread_mutex_lock(&co->idx_msg_lock);
+            idx_free(&co->idx_msg, mhead->msgid);
             co->messages[mhead->msgid] = NULL;
-            pthread_mutex_unlock(&co->idx_ch_lock);
+            pthread_mutex_unlock(&co->idx_msg_lock);
 
             /* now just free it */
             pthread_mutex_destroy(&msg->wait);
@@ -775,7 +787,7 @@ conn_t *connection_master_link(conn_sys_t *ssys, int sck, struct in_addr *addr)
       head->opcode = r;
       if(r != SNE_SUCCESS) { /* we finish */
         head->payload_length = 0;
-        __conn_write(co, buf, sizeof(sntllv2_head_t));
+        __conn_write(co, head, sizeof(sntllv2_head_t));
         destroy_sexp(sx);
         goto __fail3;
       }
@@ -793,6 +805,10 @@ conn_t *connection_master_link(conn_sys_t *ssys, int sck, struct in_addr *addr)
   r = __connection_second_alloc(co);
   if(r != SNE_SUCCESS)  goto __fail3;
 
+  /* free message */
+  co->messages[0] = NULL;
+  free(msg);
+
   /* and now we're need to create a thread poll */
   if(!(bundle = malloc(sizeof(sntllv2_bundle_t)))) { r = SNE_ENOMEM; goto __fail4; }
   else {
@@ -992,18 +1008,27 @@ conn_t *connection_link(conn_sys_t *ssys, const char *host,
     sx = parse_sexp(bbuf, rd);
     if(!sx) { r = SNE_BADPROTO; goto __fail2; }
     r = __eval_syssexp(co, sx);
+    if(!r) r = SNE_SUCCESS;
     destroy_sexp(sx);
+
+    /* write back */
     head->opcode = r;
     head->payload_length = 0;
     wr = __conn_write(co, head, sizeof(sntllv2_head_t));
-    if(wr < 0) goto __fail2;
-    if(r != SNE_SUCCESS) goto __fail2;
+    if(wr < 0) {
+      blub("fuck");
+      r = SNE_LINKERROR; goto __fail2;}
+    if(r != SNE_SUCCESS) { r = SNE_LINKERROR; goto __fail2;}
   }
 
   /* if we're there - negotiation is done, going to init messaging mode */
   r = __connection_second_alloc(co);
   if(r != SNE_SUCCESS)  goto __fail3;
 
+  /* free message */
+  co->messages[0] = NULL;
+  free(msg);
+
   /* and now we're need to create a thread poll */
   if(!(bundle = malloc(sizeof(sntllv2_bundle_t)))) { r = SNE_ENOMEM; goto __fail4; }
   else {
diff --git a/tests/lv2sc.c b/tests/lv2sc.c
index 4e81fe1..81565a9 100644
--- a/tests/lv2sc.c
+++ b/tests/lv2sc.c
@@ -34,12 +34,95 @@
 /* define a little bit */
 #define DEFAULT_PORT  13133
 #define CHANNEL_COUNT 200
-#define CLIENT_COUNT 100
+#define CLIENT_COUNT 256
 #define MESSAGES_PER_SESSION 10000
 #define ITERATION_COUNT 1000
 
 #define FAILS_ONLY
 
+struct testdata {
+  int uc;
+  pthread_mutex_t ulock;
+  conn_t *co;
+};
+
+static int __init_testdata(struct testdata *t, conn_t *co)
+{
+  t->uc = 0;
+  pthread_mutex_init(&t->ulock, NULL);
+  t->co = co;
+  return 0;
+}
+
+static void __wait_completion(struct testdata *t)
+{
+  pthread_mutex_lock(&t->ulock);
+  if(t->uc) {
+    pthread_mutex_lock(&t->ulock);
+  }
+  return;
+}
+
+static int __set_typed_list_callback(conn_t *co, int ch, char *desc)
+{
+  printf("allowed channel %d (%s)\n", ch, desc);
+  return SNE_SUCCESS;
+}
+
+static void *__addsthrd(void *a)
+{
+  struct testdata *t = a;
+  conn_t *co = t->co;
+  chnl_t *mch;
+  sxmsg_t *msg;
+  char mmbuf[1024];
+  size_t ln;
+  int mr, i;
+
+  pthread_mutex_lock(&t->ulock);
+  t->uc++;
+  pthread_mutex_unlock(&t->ulock);
+
+  /* here we go */
+  mch = sxchannel_open(co, 12);
+
+  if(!mch) {
+    fprintf(stderr, "Failed to openchannel with %d\n", errno);
+    goto __fini;
+  }
+
+  for(i = 0; i < MESSAGES_PER_SESSION; i++) {
+    ln = snprintf(mmbuf, 1024, "(ar-add (10 10))");
+    mr = sxmsg_send(mch, mmbuf, ln, &msg);
+    switch(mr) {
+    case SNE_RAPIDMSG:
+      fprintf(stdout, "Rapidly replied: %s\n", (char *)sxmsg_payload(msg));
+      sxmsg_clean(msg);
+      break;
+    case SNE_REPLYREQ:
+      if(sxmsg_datalen(msg)) fprintf(stdout, "Replied (confirmation required): %s\n",
+                                     sxmsg_payload(msg));
+      mr = sxmsg_return(msg, SNE_SUCCESS);
+      fprintf(stderr, "mr = %d\n", mr);
+      break;
+    case SNE_SUCCESS:
+      fprintf(stdout, "Success.\n");
+      break;
+    default:
+      fprintf(stderr, "ERROR: %d\n", mr);
+      break;
+    }
+  }
+
+  sxchannel_close(mch);
+
+ __fini:
+  t->uc--;
+  if(t->uc <= 1) pthread_mutex_unlock(&t->ulock);
+
+  return NULL;
+}
+
 int main(int argc, char **argv)
 {
   char *rootca = NULL, *cert = NULL;
@@ -116,15 +199,82 @@ int main(int argc, char **argv)
   }
 
   /* Tests */
+  struct timeval beg, end;
   /* try to open connection */
-  connections_set_channelcall(ssys, NULL);
+  connections_set_channelcall(ssys, __set_typed_list_callback);
 
+  gettimeofday(&beg, NULL);
   co = connection_link(ssys, addr, port, cert, login, password);
 
   if(!co) {
     fprintf(stderr, "Failed to connection with %d\n", errno);
     return errno;
   }
+  gettimeofday(&end, NULL);
+
+  if((end.tv_sec - beg.tv_sec) > 0) {
+    printf("Seconds: %ld ", end.tv_sec - beg.tv_sec);
+    printf("µS: %ld\n", end.tv_usec + (1000000 - beg.tv_usec));
+  } else printf("µS: %ld\n", end.tv_usec - beg.tv_usec);
+
+  /* ok now we should open a channel */
+  chnl_t *testchannel = sxchannel_open(co, 12);
+
+  if(!testchannel) {
+    fprintf(stderr, "Failed to openchannel with %d\n", errno);
+    return errno;
+  }
+  gettimeofday(&end, NULL);
+
+  if((end.tv_sec - beg.tv_sec) > 0) {
+    printf("Seconds: %ld ", end.tv_sec - beg.tv_sec);
+    printf("µS: %ld\n", end.tv_usec + (1000000 - beg.tv_usec));
+  } else printf("µS: %ld\n", end.tv_usec - beg.tv_usec);
+
+  /* ok, send a message */
+  char mmbuf[1024];
+  sxmsg_t *msg;
+  size_t ln;
+  ln = snprintf(mmbuf, 1024, "(ar-add (10 10))");
+  int mr = sxmsg_send(testchannel, mmbuf, ln, &msg);
+  switch(mr) {
+  case SNE_RAPIDMSG:
+    fprintf(stdout, "Rapidly replied: %s\n", (char *)sxmsg_payload(msg));
+    sxmsg_clean(msg);
+    break;
+  case SNE_REPLYREQ:
+    if(sxmsg_datalen(msg)) fprintf(stdout, "Replied (confirmation required): %s\n",
+                                   sxmsg_payload(msg));
+    mr = sxmsg_return(msg, SNE_SUCCESS);
+    fprintf(stderr, "mr = %d\n", mr);
+    break;
+  case SNE_SUCCESS:
+    fprintf(stdout, "Success.\n");
+    break;
+  default:
+    fprintf(stderr, "ERROR: %d\n", mr);
+    break;
+  }
+
+  int ee = sxchannel_close(testchannel);
+  printf("ee = %d\n", ee);
+  gettimeofday(&end, NULL);
+
+  if((end.tv_sec - beg.tv_sec) > 0) {
+    printf("Seconds: %ld ", end.tv_sec - beg.tv_sec);
+    printf("µS: %ld\n", end.tv_usec + (1000000 - beg.tv_usec));
+  } else printf("µS: %ld\n", end.tv_usec - beg.tv_usec);
+  sleep(10);
+  /* ok, now we need to create many threads */
+  struct testdata trd;
+  pthread_t thrd;
+  int i;
+  __init_testdata(&trd, co);
+
+  for(i = 0; i < 256; i++)    pthread_create(&thrd, NULL, __addsthrd, &trd);
+
+  __wait_completion(&trd);
 
   return 0;
 }
+
diff --git a/tests/lv2sd.c b/tests/lv2sd.c
index e20c845..591e2ec 100644
--- a/tests/lv2sd.c
+++ b/tests/lv2sd.c
@@ -90,7 +90,7 @@ static int __secure_check(conn_t *co)
 static int __set_typed_list_callback(conn_t *co, int ch, char *desc)
 {
   printf("allowed channel %d (%s)\n", ch, desc);
-  return 0;
+  return SNE_SUCCESS;
 }
 
 /* list of rpc calls functions */