ATI 3870 and 3DMark06

Today I moved my 8800 to a new computer and installed a MSI 3870 in this computer. I was
running Vista and everything worked fine.
I swapped the HDDs and installed XP. Everything worked until I tried to run 3DMark06.
The splash screen comes up then hangs. I unloaded, redownloaded, reinstalled 3D-06 and still have the same problem.
I have not used an ATI card for quite a while so am not sure if I missed something during the install or it is just a fluke problem.
running Vista and everything worked fine.
I swapped the HDDs and installed XP. Everything worked until I tried to run 3DMark06.
The splash screen comes up then hangs. I unloaded, redownloaded, reinstalled 3D-06 and still have the same problem.
I have not used an ATI card for quite a while so am not sure if I missed something during the install or it is just a fluke problem.