Can't download pack from Marketplace.

I don't know what I'm doing honestly, and it took quite a bit of work to get here but I found a bug! I am trying to download the Music Pack from the Marketplace, as I can not listen to jukeboxes. I have tried multiple times to download the pack, but it keeps glitching out. I have to sit through the first loading screen, which works normally, but then comes the second loading screen. The loading screen completely glitches the game out: cutting off the background music, freezing the screen, and sending me back to the main menu. I still have not been able to get the pack, and like I said, have tried multiple times.

Im hoping you can fix this for me, I'm really eager to hear Pigstep for the first time! A new music disc is a memorable moment for Minecraft in my opinion.
(If you look at the picture, you can see that some of the text has disappeared.)
 

Lots of love,
Paris!