Does your computer run CDs at all, even just normal ones? I ask b/c I had a situation not too long ago when I tried to burn a CD and the WindowsXP decided that the burning software loaded on my computer would make it unstable, and then from there out, my CD drive didn't exist. What irks me was that the software was already loaded on the computer when I bought the stupid thing, as was XP. I had never even used it before.
So if your computer isn't recognizing the drive again, you may have to download a new driver for it and try again. Unfortunately, Katie NoNo Bear pulled my computer (laptop) off the coffee table and it has been out of commission since, so I haven't been able to even try doing this myself.
Hopefully your problem is much simpler!