Enable AHCI non-boot drive

I have an ASUS P5B Deluxe with LSI SAS controller. My boot drive is on the
SAS controller and then I have an additional drive on the Intel SATA
controller. I originally built machine with IDE mode enabled for controller
and want to switch to AHCI for it. I figured it wouldn't be a problem since
it isn't even my boot drive. I enabled the AHCI driver by following the
instructions in the the non-English versions of KB922976 (where is the
english one?). When I boot the machine I don't get any error messages it
simply doesn't do anything after the BIOS. If I CTRL-ALT-DEL the vista
repair wizard comes up and says to boot from CD due to problems. I can't
boot from vista install media either, after the loading windows bar it just
freezes as well. I am wondering if there is some conflict between SATA-AHCI
and SAS controllers? Any one have any ideas?

Brian Hoyt