Just a shot in the dark here. Have you tried formating the drive in the sata bios or with Maxtor tools?
At one time you couldn't use a drive unless you first formatted it using the manufacturer tools. This doesn't happen today since new bios and operating systems can do this for you. It probably will not help, but, it is a shot anyway.
Also, there is a possibility that the drive or motherboard is bad. Have you tried using another drive? Maybe try using an IDE drive? The sata channel might be dead.
At this point I would start looking at the hardware to see if it is defective.