WinInet ERROR_INTERNET_CANNOT_CONNECT on SSL - c++

Question

I've wrote program that does simple HTTP POST.
When using HTTP protocol all goes well, but when changing to HTTPS i get this error:
ERROR_INTERNET_CANNOT_CONNECT
Request("GET","www.google.pl",80,false,"/","",""); //works
Request("GET","www.google.pl",443,true,"/","",""); //ERROR_INTERNET_CANNOT_CONNECT
What's funny is that i've also tried it on XP and there, insteed of ERROR_INTERNET_CANNOT_CONNECT i have (Internet Explorer 7, which can open https pages correctly)
Here is the Request() body:
string Request(const char* Method, const char* Host,int Port,bool Secured, const char* url, const char* header, const char* data)
{
char buffer[1024];
string ret;
HINTERNET internet = InternetOpenA("mikmas", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
if(internet == NULL)
throw OpenInternetException();
HINTERNET connect = InternetConnectA(internet, Host, INTERNET_DEFAULT_HTTP_PORT, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 0);
if(connect == NULL)
{
InternetCloseHandle(internet);
throw CantConnectException();
}
int flag=INTERNET_FLAG_HYPERLINK | INTERNET_FLAG_IGNORE_CERT_CN_INVALID |
INTERNET_FLAG_IGNORE_CERT_DATE_INVALID |
INTERNET_FLAG_NO_AUTH |
INTERNET_FLAG_NO_CACHE_WRITE |
INTERNET_FLAG_NO_UI |
INTERNET_FLAG_PRAGMA_NOCACHE;
if (Secured)
flag|=INTERNET_FLAG_SECURE;
HINTERNET request = HttpOpenRequest(connect, Method, url, "HTTP/1.1", NULL, NULL, flag, NULL);
if(request == NULL)
{
InternetCloseHandle(request);
InternetCloseHandle(connect);
throw CantOpenRequestException();
}
int datalen = 0;
if(data != NULL) datalen = strlen(data);
int headerlen = 0;
if(header != NULL) headerlen = strlen(header);
if (!HttpSendRequest(request, header, headerlen, (void*)data, datalen))
throw CantSendRequestException();
DWORD read;
while(InternetReadFile(request, buffer, 1023, &read) && read)
{
buffer[read] = 0;
ret+=buffer;
}
InternetCloseHandle(request);
InternetCloseHandle(connect);
InternetCloseHandle(internet);
return ret;
}
I'm really confused when using WinINET. A so simple action - stupid, simplest POST over https and it's almost impossible in cpp?