Try deleting your LW Preferences folder whilst LW is closed; instructions here: Point #2 & 3 in Fixes for Limewire (sample image included.)

Also see the following link & follow “ALL” the off-shoot links to find hints & extra skills to help solve your problem: To continue files downlding (click on link)

* If still problems after this, then it might be your ISP who have detected your high bandwidth use & decided to shape the bandwidth specifically for p2p use. (They have a special program that can detect & control bandwidth for specific programs & users.)