Bad_pool_caller ATI Radeon

Hi All

I installed ATI Radeon X1650 PCIE on my windows XP home edition and the hardware is a hp Pavilion a1640n (intel core2 duo). After installing the hardware and then the drivers. Afterwards my computer started crashing/rebooting, i went into the safe mode with networking and here are the error and the minidump, i'd really appreciate if if someone could tell me what's going on and how can i fix it.
 
Your minidump: 0xC2 BAD_POOL_CALLER error; are usually caused by faulty drivers or buggy software. Since it appears your issues began with your video card I'd begin with updating those drivers first.
 
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