There could be seveal reasons for this kind of problem.
The first thing to try would be deleting the Limewire preference folder when LW is completely closed (i.e. also in the system tray) as explained here (Point #2 & 3 in Fixes for Limewire)
http://www.gnutellaforums.com/showth...threadid=36420
If that doesn't do the trick, you should uninstall both, LW and all Java versions on your computer. Then downloading the newest Java version (JRE offline installer) for your OS from here:
http://java.sun.com/j2se/1.5.0/download.jsp
After you have installed the Java version reboot and install LW again.
In any case, LW will need some time to fully connect to the network (can anything from 2 - 45 minutes; for me sometimes even more than an hour), so give it some time to settle down.
