lurkswithin is on the money ... need to confirm that your cd drive is actually detected in BIOS first, listed on an IDE channel (i.e. primary slave or secondary master). If it's not even showing up in My Computer, you can't very well install drivers for something that isn't there, now could ya?
If BIOS isn't detecting it, then maybe all you'd have to do is re-seat the IDE and power cables to it and try re-booting.