Im having a problem with my Sony DVD drive and a Sony CD burner. I have them configured as DVD = master, burner = slave. After I have them hooked up they show up in the BIOS as UNKNOWN Devices. And dont show up on windows but if I unplug the burner, the DVD SHOWS up and works fine. Visa Versa, So I dont understand what the problem is

My computer is a DELL Precision 330 (somewhat problematic)
stuff plugged in...

Sony DVD
Sony CD-RW
250 GbHDD
20 Gb HDD
20 Gb HDD
20 Gb HDD

last two are through a Promise Ultra 100 PCI IDE card thing.

Everything else works fine but Im lost with the Cd drives, any suggestions?
Hook up just the burner as master and it should be at the end of the ribbon cable. Leave the other drive out for now.
Burners should be master anyways.
Re-boot and see if it's picked up properly...if so do a few cold boots in a row and shut down.
Now introduce the CDRom as slave hooked to the middle connector.
Re-boot and see what happens...

If this produces no joy joy you may NEED to remove both drives temporarily and re-boot with the Promise floppy in and re-install the drivers.

Then simply repeat the above steps.