Music discs aren't playing sound when I put them into a jukebox even though my sound is all the way up. I tried downloading the free music pack on the marketplace and once I get through set 1 of downloading content it just kicks me and brings me back to the marketplace menu. I try to reload Minecraft like people are saying to but that doesn't work. I keep trying to download it but it just never will. Is there any other way for me to fix this?