1. ISP's known to BLOCK or Filter p2p or specifically Limewire But this might not be your problem.

2. Did you configure your firewall so it allows LW full access (advisable not to have 2 active firewalls b/c they can interfere with each other); Firewall configuration instructions (click on link)

3. 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?

Can you give us a total desciption of your set up:
4. OS version? (eg: Windows 98)
5. What firewalls you have?
6. How much ram?
7. Hard Disk space available?
8. Connection type? (eg: dialup, broadband, cable, etc.)
9. Modem & router brand name & model numbers?
10. Where are you trying to connect from (home, school, work, etc.)?
11. What version of Limewire (LW) & Java do you have? (Go to LW's menu Help>About LW...) Will show both LW & Java version.