I have music on my phone that I previously downloaded from 'music junk' & I haven't listened to it in awhile. About 4 days ago, I tried to get some ringtones from several free apps but they wouldn't play. It stated that audio files could not be used with my player or error occured or something. Then I decided to check my other music which has alwaysplayed but it said the same thing! What has gone wrong???