QUOTE(ttsgeb @ Feb 26 2013, 09:34 PM)

Try it again with the jumper set to master.
thank you, but it's still a no-go. i've tried master, slave, cs, and no jumper... for some reason, it only likes to work when it's plugged in before the dvd.. 
i've also tried a different ribbon cable, and another (modded) xbox. all give same results.