Have you tried to install an OS on one of the disks yet? The BIOS may not be recognizing them because they're not formatted. If you can't install an OS, then either you didn't hook them up right or they're DOA.
Thanx for replying Raybob. I found out that I had to turn off a board feature (J-Micron Controller) that was defaulted 'on'. It didn't find my HDs because I wasn't using that feature. When I disabled it all is well. Thanks again.