Firstly I would put your Hard Disks on IDE0 (Primary) and you optical drives on IDE1 (Secondary), this is the most common setup.
Also check the BIOS is recognising all the drives and DMA modes enabled in BIOS/Windows. If you're using 80pin IDE cables make sure the Master is on the end and the Slave in the middle.
If your K7 board uses an nForce chipset and is using the nForce IDE controller, uninstall it and use the standard Windows IDE controller.
If you're already using the standard Windows IDE controller you could try uninstalling the Secondary IDE controller (if you've put your optical drives on this channel) in Windows and rebooting so windows will re-install the software for the Secondary IDE and possibly clear up any config problem.
If you still don't get it working try the drive in another system to prove it actually works and is not faulty!