AMD785G/Radeon HD 2400 BSOD issues

Hello!
I recently built a computer (a month or two ago), and I initially had Vista installed on it. However, once Windows 7 came out, I naturally upgraded. Anyway, whenever I play WoW, I randomly get a BSOD pertaining to a file called atikmdag.sys or one called dxgmms1.sys. I have already installed the latest Windows 7 64-bit drivers for my hardware, and I even did a rollback and still had the problem. I have seen several people having this problem when playing several games, but they were all from before the official release of Window 7. It might also be worth noting that it doesn't seem to be happening in a certain time interval, as I've seen several people getting a crash within the first 10 minutes of gameplay. Sometimes I have played and gotten the error after hours of playing and sometimes after minutes.

Anyway, to wrap up this rather long-winded post, I will attach the dump files and give you my specs.

Mobo Chipset: AMD785G
Graphics: Integrated HD 2400, hybrid crossfired HD 4200 Pro
Processor: Phenom II x3 720

I'm not really sure what other information might be needed. I have the latest version of DirectX, and everything else seems to be up to date. If anyone could help me resolve this problem I would be very grateful.
Thanks in advance.

Dumps: http://ruvvan.webs.com/dumps.rar

As you said, all of these crashes are in or around the ATI graphics card and its drivers.

Is anything overclocked?

Is the cooling adequate?

Given the up-to-date drivers, this is likely to be some sort of hardware-layer problem, so try reseating the connectors, cleaning contacts, moving the video card to another slot...