Computer can't detect my HDD - please help

Hello I have a very weird problem, once I boot my computer the memory shows and all is ok, then it gets to the drive detection (HDDs, CDs etc.)
It writes the line "Detecting IDE drives..." and just gets stuck

I tried:

(*) Only plugging my DVD Writer without my HDD - the computer detects it, all is ok and it keeps on booting.

(*) Plugging nothing at all - the computer just writes:
Master - none
Sec. Master - none
Slave - none
Sec. Slave - none
And keeps on booting.

(*) Changed the IDE cable - didn't help.

(*) Changed the IDE port from the motherboard - didn't help.

(*) Put a different HDD - didn't help.

(*) Reset the Bios, meaning, cleard the CMOS by removing the battery, switching the jumper back and forth - didn't help.

(*) The jumpers are ok (HDD is on 'Master or Single' and DVD is on 'Slave')

I don't know what to do, maybe it has something to do with the bios? I don't know much about the bios.

My Specs:
MotherBoard: Asus A7N8X Deluxe
Memory: 768 Mb DDR
AMD Athlon XP 2400+ (2000 MHz)
HDD: WD 80GB 7200

Does anyone have any tips? I really don't know what to do anymore. :confused:

Thank you.