When you installed you burner, did you install it into the primary of secondary IDE Slot? It may be trying to boot from the CDRW, it happened to me a long time ago. Switch the CDRW's and hard drive's cables. If they are connected on the same cable, that may be a problem, too. Try to keep the hard drives and removable storage drives separate, I personally find that you'll have less problems this way. Write back to tell me how it goes.