Help! Penumbra won't load!

[Antti]

I bought the game, downloaded and activated, but now, when i start the game the screen stays black and then a box pops up and says that the game has crashed.

But my demo works fine, so that's the problem :S

Specs:

OS: Windows Vista Home Premium
PROCESSOR: AMD ATHLON™ 64 X2 DUAL CORE PROCESSOR 5000+ 2.60 GHZ
RAM: 3GB
OS TYPE: 32BIT