Is one of your MP3 files suddenly not playing correctly? It could be that the information in the ID3 tag is damaged. This information is common to all MP3 files, and if it’s not correctly interpreted by a player, it will produce compatibility errors and won’t be played.
If this is true in your case, with MP3 Repair Tool you can clean up the information that tags those MP3s that aren’t playing correctly so that they will be accepted once again.
Using it is as simple as selecting the files you want to modify and hitting the Repair button. In just a couple of seconds you’ll have a new MP3, free of damaged information.