I am playing MKV files on my xbox 360, it looks really great for about 5 ,minutes into movie and then it just stops playing and reverts back to Xbox menu. It does this at the exact spot in movie numerous times.. Then i tried another movie and the same thing happened, this time like 10 minutes into it.

Both movie files are fine. (I played them with a Divix+ media player and it plays the whole movie fine..

What should I do????