Help, Please. Game Problems.

I installed the Mohha Spearhead Demo latley. And it did not work. But then I found a post here about this problem. I went to this link and got this file. After that the game actually opened up and music started to play, but the graphics are not visible. It just shows a pure black screen.

Er… uh…

What kind of graphics card are you using? Is it within minimum specs?

Do you have the latest drivers for it?

I do not know, how do I find out.