Amnesia: The Dark Descent & Justine DLC crashing

[p0rtalthinker]

Ok so I downloaded the update and was very excited to play the new DLC. The first time I opened it the game had a black screen with my curser, and after alt-tabbing out I find an exception access violation error message. closing the game and opening it again, I tried loading up the DLC and it did it perfectly.

Now tonight when I wanted to try my luck with it again, I got booted out with the same message (EXCEPTION_ACCESS_VIOLATION in module atioglxx.dll at -insert lots of numbers and letters here- (that particular file is in my system 32 folder btw), and this time closing and trying to launch it again didn't work. Any help on how I can resolve this issue? I'm running win7 64-bit with the latest ATI driver.... and I don't think anything changed from before the update that should make the game error out like this...