You should be able to look in My Computer (if using XP) and see how many devices you have in the computer....how many drives in other words. Your hard drive seems to use an IDE interface and is almost certainly set as Master on the Primary IDE Channel. If you have other hard drives, they could be on primary or secondary.
On a normal setup, the optical drive (assuming one) will be Device 0 on the Secondary IDE channel....(this varies, but this is the basic setup).
I've included a picture showing the Secondary IDE channels in my old backup computer. You can see there are two drives here, both optical drives, using Ultra DMA 4 and Ultra DMA 2. Those are the normal settings in Current Transfer Mode. What you don't want to see is an optical burner in PIO mode.
If nothing is showing up as PIO, you may simply have a defective burner.