특정 포트에서 ftp의 전송 자료를 받기 위해서

다음과 같이 짰습니다.

accept에서 좀 멈추다 아무 자료도 안 받더군요.

제가 무엇이 틀렸을까요? ..

c++쪽에 가서 물어야 하나~
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ascii
quote port xxx.xxx.xxx.xxx.xx.xx (제쪽 아이피 4643포트.)
quote list -aR

my server source ------------------------------------------------------------


  SOCKET s;
             SOCKADDR_IN addr;
             SOCKADDR_IN clientAddr;

             char buf2[1024];
             int i,len,len2;
             int nClientAddrLen;

             s=socket(AF_INET, SOCK_STREAM, 0);

    if ( s != INVALID_SOCKET ){


                addr.sin_family = AF_INET;
                addr.sin_port = htons(4643);
                addr.sin_addr.s_addr = inet_addr("xxx.104.xx.23");


         if( bind(s, (LPSOCKADDR)&addr, sizeof(addr)) != SOCKET_ERROR ){

                 FILE *fp;
                 fp = fopen("test.pck", "wb");

            if(listen(s,10)!=SOCKET_ERROR){

                   nClientAddrLen=sizeof(clientAddr);                

                   if(accept(s,(LPSOCKADDR)&clientAddr,&nClientAddrLen)!=
SOCKET_ERROR){
                      len2=sizeof(addr);
                      while (1) {
                             len = recvfrom(s, buf2,
1024,0,(LPSOCKADDR)&addr,&len2);

                             if (len <= 0) break;
                               fwrite(buf2, len, 1, fp);
                       }
                       fclose(fp);
                    }