I hope one of you has an idea of what's going wrong.
 
I'm building a Pentium 4 as a present for someone. Here's a quick rundown of the parts:
 
ABIT TH7II Pentium 4 (478) motherboard
Inwin S508-ATX case w/300 watt power supply
Western Digital 40GB ATA-100 7200rpm drive
SONY 16x DVD-ROM
SONY 3 1/2" disk drive
ATI RADEON 7500 AGP video card.
 
OK, so here's the problem. When I boot up, it is unable to detect the hard drive. I've plugged the hard drive into another computer and it detected it without a problem. I even formatted it to make sure it wasn't bad. I've removed everything except the video card a and hard drive just to narrow things down a bit, but still no luck. This is the second ABIT board I've had this problem with. The funny thing is, it can detect the DVD drive, so the IDE controllers appear to be working fine. I've tried the IDE cable that came with the drive, the one that came with the motherboard, and the one from another computer with no better luck.
 
Any ideas?