GrabWeb not working on MT4 Build 600

This code has worked flawlessly for me up until testing it in MT4 build 600, where it no longer verifies accounts from my server.

bool bWinInetDebug = false;

string errorMsg;
 
int hSession_IEType;
int hSession_Direct;
int Internet_Open_Type_Preconfig = 0;
int Internet_Open_Type_Direct = 1;
int Internet_Open_Type_Proxy = 3;
int Buffer_LEN = 250;
string answer;

#import "wininet.dll"
 
#define INTERNET_FLAG_PRAGMA_NOCACHE    0x00000100 // Forces the request to be resolved by the origin server, even if a cached copy exists on the proxy.
#define INTERNET_FLAG_NO_CACHE_WRITE    0x04000000 // Does not add the returned entity to the cache. 
#define INTERNET_FLAG_RELOAD            0x80000000 // Forces a download of the requested file, object, or directory listing from the origin server, not from the cache.
#define INTERNET_FLAG_KEEP_CONNECTION   0x00400000  // use keep-alive semantics
#define INTERNET_OPEN_TYPE_PRECONFIG                    0   // use registry configuration
#define INTERNET_SERVICE_HTTP   3
#define HTTP_ADDREQ_FLAG_ADD            0x20000000
#define HTTP_ADDREQ_FLAG_REPLACE        0x80000000
int InternetOpenA(
    string     sAgent,
    int        lAccessType,
    string     sProxyName="",
    string     sProxyBypass="",
    int     lFlags=0
);
 
int InternetOpenUrlA(
    int     hInternetSession,
    string     sUrl, 
    string     sHeaders="",
    int     lHeadersLength=0,
    int     lFlags=0,
    int     lContext=0 
);
 
int InternetReadFile(
    int     hFile,
    string     sBuffer,
    int     lNumBytesToRead,
    int&     lNumberOfBytesRead[]
);
 
int InternetCloseHandle(
    int     hInet
);

int HttpOpenRequestA(
    int hConnect,
    string lpszVerb,
    string lpszObjectName,
    string lpszVersion,
    string lpszReferrer,
    string lplpszAcceptTypes,
    int  dwFlags,
    int  dwContext);
    
int  InternetOpenA(
    string lpszAgent,
    int dwAccessType,
    string lpszProxy,
    string lpszProxyBypass,
    int dwFlags
    );    
    
int InternetConnectA(
    int hInternet,
    string lpszServerName,
    int nServerPort,
    string lpszUserName,
    string lpszPassword,
    int dwService,
    int dwFlags,
    int dwContext
    );

bool HttpSendRequestA(
    int hRequest,
    string lpszHeaders,
    int dwHeadersLength,
    string lpOptional,
    int dwOptionalLength
    );  
    
bool HttpAddRequestHeadersA(
    int hRequest,
    string lpszHeaders,
    int dwHeadersLength,
    int  dwModifiers
    );          
#import



int logId;
void Log(string st)
{
   if(logId>=0)
   {
      
      FileWrite(logId, TimeToStr(TimeCurrent(),TIME_DATE|TIME_SECONDS) + ": " + st);
   }
}



int init() 
{ 
GrabWeb("http://www.website.com/query.php?accountnumber="+AccountNumber()+"&login="+User, answer);
}



int hSession(bool Direct)
{
    string InternetAgent;
    if (hSession_IEType == 0)
    {
        InternetAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; Q312461)";
        hSession_IEType = InternetOpenA(InternetAgent, Internet_Open_Type_Preconfig, "0", "0", 0);
        hSession_Direct = InternetOpenA(InternetAgent, Internet_Open_Type_Direct, "0", "0", 0);
    }
    if (Direct) 
    { 
        return(hSession_Direct); 
    }
    else 
    {
        return(hSession_IEType); 
    }
}

bool GrabWeb(string strUrl, string& strWebPage)
{
    int     hInternet;
    int        iResult;
    int     lReturn[]={1};
    string     sBuffer="x";
    int     bytes;
    
    hInternet = InternetOpenUrlA(hSession(FALSE), strUrl, "0", 0, 
                                INTERNET_FLAG_NO_CACHE_WRITE | 
                                INTERNET_FLAG_PRAGMA_NOCACHE | 
                                INTERNET_FLAG_RELOAD, 0);
                                
 
    if (hInternet == 0) 
        return(false);
         
    iResult = InternetReadFile(hInternet, sBuffer, Buffer_LEN, lReturn);     

    if (iResult == 0) 
        return(false);
    bytes = lReturn[0];

    strWebPage = StringSubstr(sBuffer, 0, lReturn[0]);    
    // If there's more data then keep reading it into the buffer
    while (lReturn[0] != 0)
    {
        iResult = InternetReadFile(hInternet, sBuffer, Buffer_LEN, lReturn);
        if (lReturn[0]==0) 
            break;
        bytes = bytes + lReturn[0];
       
        strWebPage = strWebPage + StringSubstr(sBuffer, 0, lReturn[0]);
    }
    
  
   
      
    iResult = InternetCloseHandle(hInternet);
    if (iResult == 0) 
        return(false);
   
    return(true);
}

int deinit() {
   FileClose(logId);
   return (0);
}