What error do you get ?
None. I run the installer and then it does nothing. Then Window gives the "Did this program install correctly" thing.
Tried running it in Compatability mode, as administrator and finally gave up.
If I remember correctly though on my same system with a HD2900Pro 1GB I was hitting 14K or so. Need to try with my 4870 just to see how it changes but still. Meh.