Strictly speaking, you don't have to install drivers for CD/DVD/CDRW/DVDRW drives in Windows 7, or most OSes actually. It's been that way for a really long time.
It's probably something with bios or the chipset drivers themselves.
If it's IDE, try switching the jumper on the drive from master to cable select or vice versa (switch it), go to Bios and see if it shows up, and then try it. If that doesn't work, you should be able to install a driver pack for the mobo chipset, even if you have to go through some hoops to get Win7 to take it. I recently loaded Win7 on a system with the Nforce4 chipset, DFI LanParty NF4 SLI, and installing the chipset drivers was a pain, as Nvidia didn't have drivers for the thing.
If you do have an NF4-based board : Read this link, it will end up saving you some time getting all of your chipset stuff perfected. If after all of this it still doesn't work, let us know.
Is the drive IDE or SATA btw?