ati radeon 9600 64mb code 43

Hi folks...
I own a HP Pavillion 5051ZX..
It has a Ati Mobility 9600 with 64MB of Ram...
I'm running vista beta 2...
It does detect it.. Install it and recognize it in device manager..
But it keeps giving error code 43 on device manager..
Tried ati catalyst for beta 2, but it keeps giving me the same error..
It says that this card is suported for aero vista, but the same error code 43..
Tried drivers from xp version and they work fine, but no aero as expected from non vista drivers, so can anyone please help me walkthrou this error code..
By the way in device manager it recognize has ati radeon mobility 9600/9700 WDDM..
Please i ask your help, has i don't know waht to do more, since i've tried the microsoft ones and ati catalyst for beta 2..
Thank you..