FTP + Multi-Table + PT + PaHud = Freeze. Fix? (maybe)

[ActionFreak]

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My fult tilt (on vista) lags like a bitch. I tried changing the affinity to 1 processor. This didn't do anything.
I turned off the sound. It runs fine. (This is all w/out PT+PAHUD running mind you)

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My old crappy desktop ran full tilt with no problems. My new laptop with Vista can only run it when the sound is off.

It tells me access is denied when i try to change the priority even though i am administrator. Can anyone help me out here?