I was having the same problem and the solution seems to be to hook your HD directly upto the MOBO, get rid of any serial ATA cards and upgrade the bios. This mobo seems to be incompatible with at least some serial ATA cards. I wrote more about it here:
http://www.hardwareanalysis.com/content/topic/46164/?o=40
and here:
http://www.experts-exchange.com/Operating_Systems/WinXP/Q_21581130.html
Hope this helps,
Jordan