Inter-process communication;msgsnd() не рабаотет;

int getCommunicationKey(){
    static int keyForConnectionFile;
    static int messageFileDescriptor;
    static const char* connectionFileName =  "ConnectionFileForProcessSync";        //1.File name
    static boolean itIsFirstCall = True;
    int newFile;
    if(!itIsFirstCall) return messageFileDescriptor;
    remove(connectionFileName);                                                     //2.If file exists remove it
    if((newFile = creat(connectionFileName, O_RDWR|0666))<0) openConnectionFileError();       //3. Create new resource
    close(newFile);
    keyForConnectionFile = ftok(connectionFileName, 's');                           //4.get key
    if((messageFileDescriptor = msgget(keyForConnectionFile,                        //5.get message
                                       IPC_CREAT|IPC_EXCL|0666))<0) openConnectionFileError();
 
    Message.mtype = 1;
    if(msgsnd(messageFileDescriptor, (struct msgbuf*) (&Message),
              bufferSize+sizeof(long), 0)<0) openConnectionFileError();          //6.send Data
 
    itIsFirstCall = False;
    return messageFileDescriptor;
}