You may need to update your Java. Remove all previous versions, then download and install the OFFLINE installer: Download Java software from Sun Microsystems

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

This might help sort out some issues with too many incompletes and can completely refresh LW: Tip: Purge the Downloads Queue! (click on blue link)

Also be aware of this http://www.gnutellaforums.com/window...downloads.html

Also you are using the beta ... it may have new bugs of its own.