http://www.shop4tech.com/item2905.html
Do you have the exact same kind of cable hooking your dvd burner up that you do hooking your hard drive up: meaning do you have an 80 wire cable hooking your dvd burner up to your motherboard?? or just a 40 wire?? (A 40 wire is standard) so if you haven't changed it then most likely you have a 40 wire. if so then please replace it with an 80 wire cable and try again. These only cost $4.99/free shipping I would at least try this before giving up it is very cheap fix.