Try playing one of the files, from your save folder, (not the LW library), through real player, and see how its sounds. If good make Real player your default player.
Limewire player can be dissabled using Limewires's options>player It is not a good player imo
WARNING Do not use DELETE in the Limewire Library to remove files from share or the Limewire player, as they will be instantly and permanently deleted from your computer.
Let us know if you need more help