Here's what another poster in another forum posted, any suggestions:
I have a Samsung drive. I am fully aware that this drive will read just about any piece of junk -- indeed it can play discs that my writer can't read any more. Which makes the problem all the more confusing.
I can take a disc -- and I've tried Prodisc, Ritek, Princo, MCC, TY, Lead-Data and Optodisc, and record any of these in my 105 or 107 (or LiteOn 851s). They always work.
Take the same kinds of media, given the same ISO image, using the same installation of Nero on the same PC under the same conditions. Burn said disc(with the 2500A this time). Disc reads back in every other drive I've used. Put it in the Xbox -- bang. Doesn't sit there trying to read the disc, comes straight back with a "This is not an Xbox game" message. This is with an early Enigmah chip.
I suspect this is NOT a media issue. There is some sort of strange incompatibility between the 2500A and my Xbox somewhere.
I am interested to know if anyone else has this problem.