I have installed GA in safe mode, so I'm able to run dx games. Where's the problem?
I use software that reads colours of pixels, and it doesn't work properly in vbox. When I point a pixel in game software reads it as black.
So I made a test and run the game, everything worked perfectly, but when I pressed PrtScr to make a screenshot I saw this:

I need to fix this somehow, in screenshot game looks like it's empty.
In my main system it works correctly, only in guest system it's like that. Any ideas?