video card problem

a few days ago a bought a radeon 9550 i followed to manual i got step
by step
( i have a onboard vga card so i disabled it in the bios and removed
the driver before that)
my problem is that when i look in the device manger i can see the card
under display adaptor
(radeon 9550 and radeon 9550 secondary).
but when i look in the display prop' the adaptor isn't listed there
and the driver is vga.dll
in got all the new driver i could found - bios, ati the same problem
in dxdiag
but nothing worked , i even did reinstall for the winxp - sp2- but it
didnt worked
please i need help quick