Error when calling extEscape for Mirror Video Driver (DemoForge Mirage Driver)

Hi!, I'm developing an application to record what is going on in the screen. In order to do that I'm trying to load a Mirror Driver (DemoForge Mirage Driver in this case). Everything goes fine until I call the extEscape function which returns zero as a result.

Could any one tell what I'm doing wrong please?

Here is my code:

#define MAP 1030

hDC = (void *)GetDC(NULL);

logger.log( 1, "[LoadDriver]: Attaching to desktop...\n");
if( SetAttachToDesktop( videoDriverShortName, 1) )
{
logger.log( 0, "[LoadDriver]: Could not set AttachToDesktop value.\n");
retVal = -1;
}

logger.log( 1, "[LoadDriver]: CommitDisplayChanges\n");
if( CommitDisplayChanges( deviceInfo, &deviceMode ) )
{
logger.log( 0, "[LoadDriver]: CommitDisplayChanges ( FAILED ).\n");
SetAttachToDesktop( videoDriverShortName, 0);
retVal = -1;
}

logger.log( 1, "[LoadDriver]:ExtEscape\n" );

int extEscapeV = ExtEscape( (HDC)hDC, MAP, 0, NULL, sizeof(DRIVER_INTERFACE), (LPSTR)drvInt );

if (extEscapeV < 0)
{
DWORD error = GetLastError();
logger.log( 0, "[LoadDriver]: ExtEscape failed with error(%d)\n", error );
logger.log( 0, "[LoadDriver]: ATENTION: Maybe you need to restart the PC.\n", error );
}
else if (extEscapeV == 0) {
logger.log( 0, "[LoadDriver]: ExtEscape failed with error(%d) [RETURN ZERO - It's not implemented in the SO!]\n", error );
DeleteObject(hDC);
retVal = -1;
}

The variable hDC has data, the deviceInfo and deviceMode seem to be OK too.

It would be great if anyone could give me some advice!
Thanks in advance!