Also...

1. OS version? Windows Vista, administrator
2. What firewalls you have? PC Guard
3. How much ram? Not a clue...
4. Hard Disk space available? Not a clue...
5. Connection type? Broadband
6. Modem & router brand name & model numbers? Not a clue...
7. Where are you trying to connect from? Home
8. What version of LimeWire (LW) & Java do you have? LW 5.1.3, Java 1.6.0_13
9. Who is your ISP? Virgin, I'm guessing (if it means which company I'm with)
10. 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? It worked
11. Are you sharing the connection with other computers or p2p sharing programs? If yes, please give details of set up. Not that I know of...
12. Is this a your 1st try at LW or is this a new problem with an experienced user. New problem with an experienced user
13. Do you see a brick wall in front of the blue world icon at the bottom of LW's interface? It tells me I'm behind a firewall and that I support firewall transfers
14. For those using a modem/router, how is your modem/router set up...are you port forwarding or is UPnP enabled? I don't understand...
15. What security programs are you using (antivirus etc)? PC Guard, I think
16. What country are you living in? England, UK
17. Has anything in your setup changed recently? Have you updated your version of LW or Java? Have you added any new software or new hardware? Have you updated any software? Have you moved house, changed internet plan or ISP etc etc? No

Hope that helps.