We bought Harry Potter and the Deathly Hallows Part 2 from Directv Cinema a couple days back. Now we're trying to watch it for the first time and everytime we go to the movie and click play we just get a black screen. No sound or anything, just a black screen. And when we're at the black screen we can't do anything, we can't pull up the guide or the playlist or anything. What happened, why won't it work?