Can't install Vista- doesn't see SATA drive

I'm using:
* GIGABYTE GA-EP45-UD3P LGA 775 Intel P45 ATX Intel Motherboard
* HITACHI Deskstar P7K500

My BIOS sees the hard drive. However, when I try to install Windows Vista, it can't see the hard drive. Strangely enough, my XP disc can see the hard drive.

I put the hard drive in a different computer and the other computer could see the hard drive. However, it still didn't work in my new computer.

I've tried setting all kinds of settings in my BIOS (AHCP, IDE, etc etc) still doesn't work

Where can I get SATA drivers to install so Vista works?

Thanks

P.S> when I first posted, it all appeared in a big block of text with \n's and \r's all over the place. Any reasons for this?