Не отправляется сообщение через Message Queue (IPC)

#include <sys/types.h> // ftok()
#include <sys/ipc.h>
#include <sys/msg.h> // msgget()

#include <string.h> // memset()
#include <stdio.h> // printf()

#include "message.h"

int hQueue; // for finish()

int main () {

  key_t hKey = ftok("test-server",'A');
  if (hKey < 0) {
    printf("Cannot create IPC-key. Please, create empty file named 'test-server'.\n");
  }
  hQueue = msgget(hKey, 0666 | IPC_CREAT);
  if (hQueue < 0) {
    printf("Cannot create message queue.\n");
  }

  int size;

  TMessage messageRecv;
  messageRecv.mtype = 1L;
  size = msgrcv (hQueue, &messageRecv, sizeof(TMessage), messageRecv.mtype, 0);
  if (size < 0) { printf("Cannot receive message from queue.\n"); }
  else { printf("Received. Result: %d\n",size); }

  int i;
  for (i = 0; i < sizeof(TMessage); i++) {
    printf("%d: %02X\n",i,((unsigned char *)&messageRecv)[i]);
  }

  TMessage messageSend;
  memset(&messageSend,0x00,sizeof(TMessage));
  messageSend.mtype = 1L;
  messageSend.size = 2L;
  size = msgsnd (hQueue, &messageSend, sizeof(TMessage), 0);
  if (size < 0) { printf("Cannot send message to queue.\n"); }
  else { printf("Send. Result: %d\n",size); }

  if (msgctl(hQueue,IPC_RMID,0) < 0) {
    printf("Cannot remove message queue.\n");
  }
  else {
    printf("Message queue removed.\n");
  }
  return 0;
}

#include <sys/types.h> // ftok()
#include <sys/ipc.h>
#include <sys/msg.h> // msgget()

#include <string.h> // memset()
#include <stdio.h> // printf()

#include "message.h"

int main() {

  printf("Size of TMessage: %lu\n",sizeof(TMessage));
  printf("Size of long: %lu\n",sizeof(long));
  printf("---\n");

  key_t hKey = ftok("test-server",'A');
  if (hKey < 0) {
    printf("Cannot create IPC-key. Please, create empty file named 'test-server'.\n");
  }
  int hQueue = msgget(hKey, 0);
  if (hQueue < 0) {
    printf("Cannot attach to message queue.\n");
  }

  int size;

  TMessage messageSend;
  memset(&messageSend,0x00,sizeof(TMessage));
  messageSend.mtype = 1L;
  size = msgsnd(hQueue,&messageSend,sizeof(TMessage),0);
  if (size < 0) { printf("Cannot send message to queue.\n"); }
  else { printf("Send. Result: %d.\n",size); }

  TMessage messageRecv;
  memset(&messageRecv,0x00,sizeof(TMessage));
  messageRecv.mtype = 0L;
  size = msgrcv(hQueue,&messageSend,sizeof(TMessage),messageRecv.mtype,0);
  if (size < 0) { printf("Cannot receive message from queue.\n"); }
  else { printf("Received. Result: %d\n",size); }
  printf("Size: %lu\n",messageRecv.size);
  int i;
  for (i = 0; i < sizeof(TMessage); i++) {
    printf("%d: %02X\n",i,((unsigned char *)&messageRecv)[i]);
  }

  return 0;
}

#ifndef __MESSAGE_H__
#define __MESSAGE_H__

// Для упрощения - минимальные значения
#define MD5_SIZE 1
#define MAX_DATA_SIZE 1

typedef struct _TMessage {
  long mtype;
  unsigned char session_id[MD5_SIZE+1];
  long size;
  char buf[MAX_DATA_SIZE];
} TMessage;
#endif

$ ./server 
Received. Result: 32
0: 01
1: 00
2: 00
3: 00
4: 00
5: 00
6: 00
7: 00
8: 00
9: 00
10: 00
11: 00
12: 00
13: 00
14: 00
15: 00
16: 00
17: 00
18: 00
19: 00
20: 00
21: 00
22: 00
23: 00
24: 00
25: 00
26: 00
27: 00
28: 00
29: 00
30: 00
31: 00
Send. Result: 0
Message queue removed.


$ ./client 
Size of TMessage: 32
Size of long: 8
---
Send. Result: 0.
Received. Result: 32
Size: 0
0: 00
1: 00
2: 00
3: 00
4: 00
5: 00
6: 00
7: 00
8: 00
9: 00
10: 00
11: 00
12: 00
13: 00
14: 00
15: 00
16: 00
17: 00
18: 00
19: 00
20: 00
21: 00
22: 00
23: 00
24: 00
25: 00
26: 00
27: 00
28: 00
29: 00
30: 00
31: 00