I came across this and thought it might help.
1. OS version? (eg: Windows 98)
Windows XP
2. What firewalls you have?
Regular windows firewall is off, and i have an expired version of Norton.
3. How much ram?
Not sure how to check
4. Hard Disk space available?
129 gb of free space
5. Connection type? (eg: dialup, broadband, cable, etc.)
Cable
6. Modem & router brand name & model numbers? Not sure the brand name, its Grande Communications. On the bottom of the Modem it says Trade name Ambit. Model # U10C018
7. Where are you trying to connect from (house, appartment complex, school, student accomodation, work, etc.)?
Appartment complex
8. What version of LimeWire (LW) & Java do you have? (Go to LW's menu Help bar > About LW...)
I have LW 4.18.8 and Java 1.5.0_05
9. Who is your ISP (Internet Service Provider)?
Grande Communications
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?
Your test worked!!
11. Are you sharing the connection with other computers or p2p sharing programs? If yes, please give details of set up.
No
12. Is this a your 1st try at LW or is this a new problem with an experienced user.
1st try at limewire
13. Do you see a brick wall in front of the blue world icon at the bottom of LW's interface?
Yes_ click here to see Sample image
14.
For those using a modem/router, how is your modem/router set up...are you port forwarding or is UPnP enabled?
If this is regarding the setting on LW I changed it to port forwarding from another post, but it was UPnP
15. What security programs are you using (antivirus etc)? Some people might not be aware that their security suite includes a firewall

I think i just have windows.
My nortons is there but its expired and I cant get rid of it but I cant run it
16. What country are you living in? Sometimes there are ISPs with the same name in more than one country (eg Clearwire in the USA & also in Ireland).
USA
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?
Nothing has changed