Poweramp Full Version 2.0.10-build-580-play Model #: Android GT-S7560M Android Version: 4.0.4 I've downloaded music, they are mp3 files. I play the song right after downloading it, it works. I listen to it a little later, it still works. I go to listen to it again, and I get failed to play file and its happening constantly..I payed for this app and it wont play mp3 files? this is the most common music format..its driving me nuts ..please help!