自个儿写了一个socket向Live555的RTSP发送消息，为什么没有回应？麻烦大家帮看下

自己写了一个socket向Live555的RTSP发送消息，为什么没有回应？麻烦大家帮看下

#include "stdafx.h"
#include   <winsock2.h>   
#include   <winbase.h>   
#include   <iostream>  

#pragma   comment(lib,   "ws2_32.lib")  

#define   PORT   554  

void main(void)   
{
        WORD         wVersionRequested;   
        WSADATA   wsaData;   
         
        int           err;   

        wVersionRequested   =   MAKEWORD(2,   2);   

        err   =   WSAStartup(wVersionRequested,   &wsaData);   
        if(err   !=   0)     
        {   
                return;   
        }   

        if(LOBYTE(wsaData.wVersion)   !=   2   ||   HIBYTE(wsaData.wVersion)   !=   2)     
        {   
                WSACleanup();   
                return;     
        }   


        SOCKET   sock;   
        sock   =   socket(AF_INET,   SOCK_STREAM,   0);
        struct   sockaddr_in     server;   

        server.sin_family =   AF_INET;   
        server.sin_port =   htons(PORT);   
        server.sin_addr.S_un.S_addr   =   inet_addr("192.168.10.177");   

        int   nConnect;     

        nConnect   =   connect(sock,   (struct   sockaddr   FAR*)&server,   sizeof(struct   sockaddr_in));   
        if(nConnect   ==   SOCKET_ERROR)   
        {   
                int   erro   =   WSAGetLastError();   

                printf("connect   fail   !");
                Sleep(3000);     

                closesocket(sock);   
                WSACleanup();     
                return;     
        }   

        char   buffer2[1000] = "DESCRIBE rtsp://192.168.10.177/bipbop-gear1-all.ts RTSP/1.0"
                                                        "CSeq: 2"
                                                        "User-Agent: testRTSP (LIVE555 Streaming Media v2012.02.29)"
                                                        "Accept: application/sdp";