Try deleting LW's preferences folder when LW's properly closed. See points 2 & 3 here....you'll probably have a folder in both locations
Fixes for LimeWire
This will kill all of your settings within options, you'll have to go back through afterwards & reset things. If you're not sure of your settings, go through LW's tools > options & write them all down, so that you can reset things later.

Some people have had trouble with the latest Java updates. Try this version instead. Use the JRE offline installer & remove your current Java version before installing this one (it's easy enough to reinstall a later Java if it turns out that Java's the problem).
Archive: Download Java 2 Platform Standard Edition (J2SE) 5.0 Update 11

Try reconfiguring your Norton firewall.
http://www.gnutellaforums.com/226610-post6.html

To get rid of the firewall icon, try port forwarding. The instructions arehere.
Port Forwarding for the Dlink DSL-302G
Don't forget the step of setting up a static IP address first. LW's listening port, port in the 'manual port forward' box & port forwarded within the D-Link should all be the same number.