I had that problem too, and i fixed it just a few days ago, at friday last week. I have a xbox slim jtag, i could only play tu 9 or lower. and if i would only enable tu 9 it would run it like it doesnt have any tus, but if i enable tus 5 and 9 at the same time, tu 9 would work. and tus suchh as 10 and 11, and maybe also others that i dont remember, i tried to play with them, but when i enabled them it was like i didnt have any tus, again. i dont remember if i tried to run them with tu 5 at the same time like i did with tu 9, but as i remeber, i didnt play with those tus. and when i enabled tu 16 (it says 16 next to that tu on the list in the tu managing in the game options, or however you call that) and it played the starting logos of mojang and such, and then i saw the game's main menu, the screen frozen at the moment i saw the main menu on the screen, while there was a pop-up messenge on it already, i think about the auto saving, and at the background there was an animation of like-in-game wich i saw a village or something else in it, and the animation was frozen, but i know it from the pc version, wich also has it, and i didnt have the animation background on the previous and working version, so i knew that tu 16 is partly working. after a few seconds that that frozen screen that i described to you was on the screen, there was suddenly a black screen, and a messenge poped-up wich said "fatal crash". and at friday last week i tried to play with tu 16 again, and it didnt work. so i enabled tus 9 and 5 again, and than i though about that tu 9 only works when tu 5 is enabled too, and maybe, and also probably, and hopefully, that maybe tu 16 will work if i will enable tu 5 too at the same time. and... . It worked!
Happy ending!
sorry for that spam-looking long messenge, i i know i could write it much shorter, but i felt a reason for writing the whole "story" .
i hoped it helped you .
