Make sure your Java is up to date:
Java 1.5 (take the JRE)
Open your Browser & do this simple test for us. Using your browser go here:
http://www3.limewire.com:6346/ The page should say ‘Test Page was a Success’. What happens when you go there?
Have you configured your firewall(s) to allow LW access (including XP firewall):
http://www.limewire.com/english/content/firewalls.shtml
Can you give us a total desciption of your set up:
1. What firewalls you have?
2. ram?
3. HDD space available?
4. Modem & router brand name & model numbers?
5. Where are you trying to connect from (home, school, work, etc.)?