Your ISP provider could be filtering your use of p2p sharing. The symptoms sound a lot like it; see ISP's known to BLOCK or Filter p2p or specifically Limewire

Make sure your firewall is properly configured for LW & only use one as 2 can interfere with each other; instructions: http://www.limewire.com/english/content/firewalls.shtml

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?

o this test: Bug Report instructions & sample image Is the result True/False?

Can you give us a total desciption of your set up:
1. OS version? (eg: Windows 98)
2. What firewalls you have?
3. How much ram?
4. Hard Disk space available?
5. Connection type? (eg: dialup, broadband, cable, etc.)
6. Modem & router brand name & model numbers?
7. Where are you trying to connect from (home, school, work, etc.)?
8. What version of Limewire (LW) & Java do you have? (Go to LW's menu Help>About LW...) Will show both LW & Java version.
9. Who is your isp provider?
10. Is this a your 1st try at LW or is this a new problem with an experienced user.