No screen in-game

[doomender]

I seem to have a bit of a unique error. Every time I try to run an AGS game, the window pops up, but displays just an empty space inside it.
Even more intriguing is that the game does appear when I drag the window around, but at no other time. Obviously, I can't drag the window around and play at the same time, so I'm at a bit of an impasse'.
As far as I know (not much), my graphics cards and system is fairly up to date, and I run XP.
Please help me.

[Khris]

Try updating DirectX and your graphics card drivers.