Can you give us a total desciption of your set up:
1. What firewalls you have?
2. Modem & router brand name & model numbers?
3. Where are you trying to connect from (home, school, work, etc.)?
4. What version of Limewire (LW) & Java do you have? (Go to LW's menu Help>About LW...) Will show both LW & Java version.
5. Who is your isp provider?
6. Do this simple test for us. Using your browser go here:
http://www3.limewire.com:6346/ The page should say 'Your test worked!'. What happens when you go there?