Windows 7 - Photoshop Crash - Error Message

My photoshop has been crashing on a regular basis lately, the message I get is below. Anyone have a clue what is causing it or how I can fix it?

Thanks!

Problem signature:
Problem Event Name: APPCRASH
Application Name: Photoshop.exe
Application Version: 12.0.0.0
Application Timestamp: 4bbc5b10
Fault Module Name: atio6axx.dll
Fault Module Version: 6.14.10.8545
Fault Module Timestamp: 4b73935a
Exception Code: c0000005
Exception Offset: 0000000000092d44
OS Version: 6.1.7600.2.0.0.256.48
Locale ID: 1033
Additional Information 1: 7fa4
Additional Information 2: 7fa4e3d0406beb6df0a49eb38fdf5883
Additional Information 3: a411
Additional Information 4: a411a7b4e0ee198ec4678d7c7314194a

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The exception code c0000005 is a memory exception. I would download a 3rd party app to test it called memtestx86. Burn it to a cd, and run it for at least 7 passes

Ken