WSA Refusing connection - howto find out the server refused connection?

hi, im refusing connection by server, if the client is on the black list. but i cant find out (in the client code), the serve refused.
the client code is:

Code:

---

        struct sockaddr_in ServerAddress;

        SOCKET Socket = WSASocket(AF_INET, SOCK_STREAM, IPPROTO_TCP, NULL, 0, WSA_FLAG_OVERLAPPED);

        if (INVALID_SOCKET == Socket)
        {
                ErrorExit("WSASocket error", WSAGetLastError());
                return SOCKET_ERROR; //error
        }

        WSAEVENT eevent = WSACreateEvent();

        WSAEventSelect(Socket, eevent, FD_CONNECT);


        ZeroMemory((char *) &ServerAddress, sizeof(ServerAddress));


        ServerAddress.sin_family = AF_INET;
        ServerAddress.sin_addr.S_un.S_addr = ulIp;
        ServerAddress.sin_port = htons(nPortNo);

       
        if (SOCKET_ERROR == WSAConnect(Socket, reinterpret_cast<const struct sockaddr *>(&ServerAddress),sizeof(ServerAddress),
                NULL, NULL, NULL, NULL))
        {
                int iErrCode = WSAGetLastError();
                if(iErrCode != WSAEWOULDBLOCK)
                {
                        closesocket(Socket);
                        ErrorExit("WSAConnect error", iErrCode);
                        return SOCKET_ERROR; //error
                }
        }

        DWORD retCode = WSAWaitForMultipleEvents(1, &eevent, TRUE, INFINITE, FALSE);
        WSANETWORKEVENTS NetworkEvents;
        if((retCode != WSA_WAIT_FAILED) && (retCode != WSA_WAIT_TIMEOUT))
        {
                if(WSAEnumNetworkEvents(Socket, eevent, &NetworkEvents) == SOCKET_ERROR)
                {
                        int iErrCode = WSAGetLastError();
                }
                if((NetworkEvents.lNetworkEvents & FD_CONNECT ) == FD_CONNECT)
                {
                        int iErrCode = WSAGetLastError();
                        if(iErrCode == WSAECONNREFUSED)
                        {
                                ErrorExit("Server refuse!", iErrCode);
                                return SOCKET_ERROR;
                        }
                }
        }

        return Socket;

---

the WSAECONNREFUSED error never occurs. how it is possible? whats wrong? im sure the server refuse connection.
thanks

Perhaps it is occurring at the router frame or some other firewall. Have you tested a traceroute?

i will try it. its some possibility to fix it? the FD_CONNECT event occurs but WSAECONNREFUSED error not.

i cant capture packets in wireshark or ethereal because they cant capture localhost packets. i tried to fix it like this http://wiki.wireshark.org/CaptureSetup/Loopback but it didnt fix it