|It might be the way you set it up.|
There are a few different ways you can set up your drives when connecting through IDEs.
You have Master/Primary and Slave/Secondary connections, you also have Jumper settings and 40/80 wire.
If you have 2 IDE wires, use 2 wires, connecting 1 to the Hard drive and 1 to your DVD drive through the Master connector. And both devices should have their Jumper setting to Master. (But they should be already)
If you only have 1 cable, your Hard Drive will most likely already be in the Master connector at the end of the wire. So to add your DVD drive to the Slave, you should set your DVD drive jumper setting to Slave.
I've read that with 80 wire, the position of devices doesn't matter, although they both have to be assigned Master or Slave on the device.
The Jumper setting is a small connector on the back of the Drive itself next to the IDE port.
You can check your PC's BIOS settings, and look at what is Master and what is Slave to make sure it's detecting it properly. Be aware though, certain configurations could impact on your PC's performance.
Although I could be totally wrong here, It may not even be that, you may have everything set up perfectly. But it's definitely worth checking out the Configuration.
Here's a link to a page with more information. It may give you a better idea: http://www.mikeshardware.com/howtos...
It could just be a bad wire or connection too.
PEBMAC - The biggest cause of Computing problems.
Damn ID10T Errors.