Error sending data via Socket

I'm working on a Kinect Application wich need to send the Real Coordenates of the face to another program, Matlab, now I've a Console Application acting as a Client (who receive the data). I test the code apart from the Kinect program and works fine (the message is sent) but when I implement it to the Kinect code the send of the message fails in the SUCCESFUL line (SUCCESFUL = -1 don't know why)

Any ideas of what I have to change in the kinect code?

KINECT FUNCTION

    void SingleFace::FTHelperCallingBack(PVOID pVoid)
    {
    SingleFace* pApp = reinterpret_cast<SingleFace*>(pVoid);
    if (pApp)
    {
    char *sendbuf = new char[buffsize];
    long SUCCESFUL;
    WSAData WinSockData;
    WORD DLLVERSION;
    DLLVERSION = MAKEWORD(2, 1);
    SUCCESFUL = WSAStartup(DLLVERSION, &WinSockData);

    SOCKADDR_IN ADDRESS;
    int AddressSize = sizeof(ADDRESS);
    SOCKET sock_LISTEN;
    SOCKET sock_CONNECTION;
    sock_CONNECTION = socket(AF_INET, SOCK_STREAM, NULL);
    listen(sock_LISTEN, SOMAXCONN);

    IFTResult* pResult = pApp->m_FTHelper.GetResult();
    if (pResult && SUCCEEDED(pResult->GetStatus()))
    {
        fstream outputFile("TrackingResults.txt");
        outputFile << "Resultados del Tracking \n";
        outputFile.close();




        FLOAT* pAU = NULL;
        UINT numAU;
        pResult->GetAUCoefficients(&pAU, &numAU);
        pApp->m_eggavatar.SetCandideAU(pAU, numAU);
        FLOAT scale;
        FLOAT rotationXYZ[3];
        FLOAT translationXYZ[3];

        pResult->Get3DPose(&scale, rotationXYZ, translationXYZ);
        pApp->m_eggavatar.SetTranslations(translationXYZ[0], translationXYZ[1], translationXYZ[2]);
        pApp->m_eggavatar.SetRotations(rotationXYZ[0], rotationXYZ[1], rotationXYZ[2]);

        // MOSTRANDO RESULTADOS EN LA VENTANDA OUTPUT
        std::string resultados = "T = [" + to_string(translationXYZ[0]) + "," + to_string(translationXYZ[1]) + "," + to_string(translationXYZ[2]) + ", ], R=[" + to_string(rotationXYZ[0]) + "," + to_string(rotationXYZ[0]) + "," + to_string(rotationXYZ[1]) + "," + to_string(rotationXYZ[2]) + "], sc=" + to_string(scale) + "/n";
        std::wstring stemp = s2ws(resultados);
        LPCWSTR results = stemp.c_str();
        OutputDebugStringW(results);

        /*Matrix to calculate the real coordenates
        A1 = 98.1987    4.8642
             -6.3882   79.6357
              9.9648   20.0521*/

        double xr = 98.1987*translationXYZ[0] - 6.3882*translationXYZ[2]  + 9.9648;
        double yr =  4.8642*translationXYZ[0] + 79.6357*translationXYZ[2] + 20.0521;
        sprintf(sendbuf, "%+07.2f %+07.2f\n", xr, yr);


        if (sock_CONNECTION = accept(sock_LISTEN, (SOCKADDR*)&ADDRESS, &AddressSize));
        {
            cout << " \n\tA connection was found! " << endl;
            send(sock_CONNECTION, sendbuf, 17, NULL);
            cout << "Sent: (" << sendbuf << ")\n"; 
        }
    }
    }   
    }

//Main Code

int APIENTRY wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PWSTR     lpCmdLine, int nCmdShow)
{
AllocConsole();
freopen("CONIN$", "r", stdin);
freopen("CONOUT$", "w", stdout);
freopen("CONOUT$", "w", stderr);


//SERVER
long SUCCESFUL;
WSAData WinSockData;
WORD DLLVERSION;

DLLVERSION = MAKEWORD(2, 1);

SUCCESFUL = WSAStartup(DLLVERSION, &WinSockData);

SOCKADDR_IN ADDRESS;
int AddressSize = sizeof(ADDRESS);

SOCKET sock_LISTEN;
SOCKET sock_CONNECTION;
sock_CONNECTION = socket(AF_INET, SOCK_STREAM, NULL);
ADDRESS.sin_addr.s_addr = inet_addr("127.0.0.1");
ADDRESS.sin_family = AF_INET;
ADDRESS.sin_port = htons(444);

sock_LISTEN = socket(AF_INET, SOCK_STREAM, NULL);
bind(sock_LISTEN, (SOCKADDR*)&ADDRESS, sizeof(ADDRESS));
listen(sock_LISTEN, SOMAXCONN);

for (;;)

{
    cout << "\n\tSERVER: Waiting for incomming connetion...";
    if (sock_CONNECTION = accept(sock_LISTEN, (SOCKADDR*)&ADDRESS, &AddressSize));
    {

        cout << " \n\tA connection was found! " << endl;
        UNREFERENCED_PARAMETER(hPrevInstance);
        SingleFace app;
        HeapSetInformation(NULL, HeapEnableTerminationOnCorruption, NULL, 0);
        return app.Run(hInstance, lpCmdLine, nCmdShow);

    }
} }

via Chebli Mohamed