On the IDE drive, set the jumper to CS (Chain Select). If you dont know how to do it, tell me what type of drive it is, and the size, perhaps I can tell you how.
western digital 80gb 8mb of cache... yea on the jumpers i see no indications of what one is cableselect.... its actually blank lol there are 5-2pin options
Set nit to Cable select, then see what happens. When you put it on CS, you are leaving it up to the computer which order to put the drives in. Since the SATA one has the boot on it, your rig should put things in the right place.