The gfx card/chip you're using is most likely NOT supported... Sorry to break the news to you like this.
Wait, I'm confused; you've been able to play on the same computer the game through before but not now? Corrupted files?
"There's a very fine line between not listening and not caring, I'd like to think that I'm walking along that line everyday." - Church, RvB
READ THIS BEFORE POSTING HERE!!!