crosshair lll's tweakit

[mrreg]

hi. i've had the crosshair lll for a couple of weeks now. combined with 2 xfx 4890 cards my best rig yet. was hoping to meddle with the overclock, but nowhere fast. i have been trying to get into tweakit, if anyone's familiar with it. i have it enabled in bios, a ps2 keyboard, it shows as enabled in windows vista (32bit), yet no response when i hit the magic P. any help please.

 

[mrreg]

while i'm waiting, avast 5 beta has been released if anyone is intrested.
perhaps i've posted in the wrong section .