[WinHTTP] WinHttpReceiveResponse + 302 Found = błąd

#include <stdio.h>
#include <windows.h>
#include <winhttp.h>
#include <Wincrypt.h>
#include <string>
using namespace std;
#pragma comment(lib, "crypt32.lib")

//#pragma comment(lib, "wininet.lib")
#pragma comment(lib, "winhttp.lib")

HINTERNET hSession = NULL,
hConnect = NULL,
hRequest = NULL;

string full_response;

int Zaloguj( string login, string pass );

int main( int argc, char * argv[] )
{
   
    hSession = WinHttpOpen( L"Ja",
    WINHTTP_ACCESS_TYPE_DEFAULT_PROXY, WINHTTP_NO_PROXY_NAME, 0, 0 );
   
    int a = Zaloguj( "abc", "effg" );
   
    if( hSession ) WinHttpCloseHandle( hSession );
   
    if( full_response.find( "Przekierowanie" ) !=- 1 ) printf( "LOGIN Success" );
    else if( full_response.find( "Nieprawid" ) !=- 1 ) printf( "LOGIN Fail" );
   
    system( "pause" );
    return a;
}

int Zaloguj( string login, string pass )
{
    if( hSession == NULL ) return 1337;
   
    if( hRequest ) WinHttpCloseHandle( hRequest );
   
    if( hConnect ) WinHttpCloseHandle( hConnect );
   
    hRequest = hConnect = NULL;
    DWORD PacketDataSize = 0;
    LPSTR pszOutBuffer;
    string data = "abecadlo";
   
    // Specify an HTTP server.
    if( hSession )
         if( !( hConnect = WinHttpConnect( hSession, L"jakasstrona.pl",
    INTERNET_DEFAULT_HTTPS_PORT, 0 ) ) ) return 1337;
   
    DWORD dwDownloaded = 0;
   
    if( !( hRequest = WinHttpOpenRequest( hConnect, L"POST", L"login", L"HTTP/1.1", 0, 0, WINHTTP_FLAG_SECURE ) ) )
         return GetLastError();
   
    DWORD temp = SECURITY_FLAG_IGNORE_UNKNOWN_CA
    | SECURITY_FLAG_IGNORE_CERT_DATE_INVALID
    | SECURITY_FLAG_IGNORE_CERT_CN_INVALID
    | SECURITY_FLAG_IGNORE_CERT_WRONG_USAGE;
   
    if( !WinHttpSetOption( hRequest, WINHTTP_OPTION_SECURITY_FLAGS, & temp, sizeof( temp ) ) )
         return GetLastError();
   
    // Send a request.
   
    if( !( WinHttpSendRequest( hRequest, L"Content-Type: application/x-www-form-urlencoded", - 1,( void * ) data.c_str(), data.size(), data.size(), 0 ) ) )
         return GetLastError();
   
   
    // End the request.
    if( !WinHttpReceiveResponse( hRequest, NULL ) ) return GetLastError(); //w tym miejscu jest problem jeśli nagłówek zawiera 302 Found
   
   
    do
    {
        PacketDataSize = 0;
        if( !WinHttpQueryDataAvailable( hRequest, & PacketDataSize ) ) return GetLastError();
       
        pszOutBuffer = new( std::nothrow ) char[ PacketDataSize + 1 ];
        if( !pszOutBuffer )
        {
            printf( "Out of memory\n" );
            PacketDataSize = 0;
        }
        else
        {
            ZeroMemory( pszOutBuffer, PacketDataSize + 1 );
           
            if( !WinHttpReadData( hRequest,( LPVOID ) pszOutBuffer,
            PacketDataSize, & dwDownloaded ) )
            {
                delete[] pszOutBuffer;
                return GetLastError();
            }
            else full_response += pszOutBuffer;
           
            delete[] pszOutBuffer;
        }
    } while( PacketDataSize > 0 );
   
   
    if( hRequest ) WinHttpCloseHandle( hRequest );
   
    if( hConnect ) WinHttpCloseHandle( hConnect );
   
    hRequest = hConnect = NULL;
    return 0;
}