why are no audio devices detected? (may involve Cirrus Logic CS4206A (AB 11) )

this is the last problem i have with boot camp. I finally managed to run the boot camp driver install thing, which fixed all the driver problems except that i still have no sound, i have tried the built in speakers, headphones, and some external speakers, but none of them are detected. Also, the sound works fine in Mac OSX mode, just not in windows.

I have Windows Vista Home Premium 32-bit, so i would probably need the drivers for that OS