i have a standard xbox {not 360 }with the samsung drive in it..it will not recognize a backup dvd movie..it tells me to insert a dvd movie or game.. my backups are all done on taiyo blanks...it wont recognize - or +r... whats the deal?...this is my second xbox and the first one i had played them fine until it crapped out.
is your Xbox modded? If so do you have a program on it called DVD RegionX that is a great movie player Also the mentioned XBMC works well I assume since they worked on the other one that they would be burned correctly. But certain drives just have more problmes then others reading back ups.
The xbox does read backup movies whether it's modded or not try doing a 1 to 1 copy of the disc again using nero 7 as sometimes depending on what software was used to burn the disc in the first place they dont work properly on some xboxes but work fine on others.