|What size and type of drive are you installing? If it's IDE and not SATA make sure the jumpers and cable position are correct.|
To see if it's some problem between the bios and drive, temporarily disconnect the drive and try going into bios setup.
Make sure you're hitting DEL when it's doing the posting process.
When you use the 'clear cmos' jumper make sure the power cord is removed. Then jumper it to the clear position for a few seconds and then back to standby.
Here's the manual if you need it: