BSOD in Amnesia

[lucasfr123]

Hello,
I am having a big problem with the amnesia. When I launch the amnesia.exe, the screen goes blue and says that:

A problem has been detected and Windows has been shut down to prevent damage to your computer
BAD_POOL_HEADER

I have a ATI HD 4650 1GB DDR2 on a windows XP and amnesia is the only game that crashes... I have Dead Space 2, Fear 3, COD MW3, and i run them on the max settings... I have already tried a lot of things, even the troubleshooting guides and nothing works . Can anybody help me? I really wanted to play this game...

Sorry if I typed anything wrong, I am brasillian and I don't talk english fluently.