Help me with my upgrade please

[Alram]

I installed a new motherboard, CPU, PCI Express graphics card, POWER SUPPLY, and RAM to a 3-4 year old desktop. The old hard drive (with Windows ME--will be installing XP), DVD ROM, CDRW, floppy drive, and case were left in place.

When I power up the computer, the BIOS does not beep. I see a splash screen for the Motherboard and graphics card. Some self tests run. When I press delete to enter setup the main menu shows "none" for any IDE devices. I am unable to open the CD or DVD drives when I press the appropriate buttons.

I tried moving the power supply cable attachments around for the drives, and changed out the IDE cable on the HD to no avail.
The amount of installed memory is correctly identified.
All fans appear to be working.

New equipment
Motherboard
MB ASUS A8V-E DELUXE K8T890 RET - Retail
PCI Express graphics card
VGA LEADTEK GF PX6600TD-256 RT - Retail
POWER SUPPLY
ANTEC NEOPOWER480 RTL - Retail
CPU
AMD 64 3500+ ATHLON 64 939 RT - Retail
RAM
DDR CRSR 512MB X2 KIT|VS1GBKIT400 - Retail

Old equipment
Western Digital HD 120 GB about 1 year old
3-4 year old CDRW
3-4 year old DVD ROM

What is wrong? Please help. This is the first time I have undertaken such a massive project.