Those are fake files. For more info, follow the links in this thread: Fake files showing up in search results (Connecting for ages with many hosts & then Need More Sources when trying to download a file.).

Look up the files with Bitzi before downloading to help sort out the bad ones. Also preview files when they get to 15%.

Tips on d/loading files in this thread: How to find music

You could also try deleting the LW preference folder. Fixes for Limewire when LW isn't operating as it should!

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If it ain't broke, fix it till it is!