Yet another crashing help thread- help

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I tried posting my problem here last week, but nobody seemed to have an answer for me. Every time I try to load my Pokemon Colosseum .iso, dolphin crashes without explanation. I discovered the error log after reading posts here, so here is the error I get:

Unhandled Exception
Code: 0xC0000005
Call stack info:
Dolphin!0x01464290 : ?

Can somebody who knows what this means tell me what my problem is? Please?