while(1)    {
                    Len = 0;
                    memset(Buffer, 0, sizeof(Buffer));

                    Len = recv(g_ServSock, Buffer, sizeof(Buffer), 0);
                    fwrite(Buffer, sizeof(char), Len, fp);
                    TotalSize += Len;

                    if(!Len)    break;      <--------- 이부분에서 빠져 나가지 못합니다 ㅜㅜ
    }

  fclose(fp);