Blue Screen invovling atikmpag.sys

After playing NS2 for about an hour or two today, I got a blue screen of death. I have done a quick search on BSOD related to atikmpag.sys and most of them is fixed by installing the latest graphics drivers, however I have already installed the latest drivers and have no idea what else I can do to fix it. Here is my dump file and my tech support.zip. I hope I have provided enough information, if not please let me know what else is needed and I hope we would be able to solve this problem together. Thanks for reading.

My computer specs:
AMD Phenom II X6 1035T processor 2.60GHz
8GB of RAM
Windows 7 Home Premium Service Pack 1 64bit
AMD Radeon HD 7770 Series
DirectX 11