Try deleting your preference folder/s...This will reset your configurations back to default and get rid of any corruption that may of happened...
Fixes for Limewire when LW isn't operating as it should LimeWire Pref Folder in Vista
Then right click on one of your files in the limewire library and select explore, this should open up your shared folder, that is by default located
C:\Documents and Settings\your username\Shared