I put music that i downloaded in mp3 file format on my Sylvania SMPK7837 player. The files play fine on my computer, but when they're on my player I get an error message saying "File format error". Anyone have any suggestions on how to fix this without having to download the songs again? Note: I have put music on it before, and it's working just fine, but it's just 22 songs that I have recently downloaded that are acting up.