first off, when using a boot disc, remember to turn on xbox, insert disc, immediately turn off, then turn on again. That should help a lot, also, make sure your d0 is on the right spot. Xecuter2's sort of stink with pogo pins, they always slide off, thats what i've heard with many people. So, i suggest you just make sure that's on too. The only reason your bios won't boot is probably, because of your d0 point.