It seems I am having the same problem as many others
I am only connecting with one bar, and it show a detection of a firewall. I noticed this problem recently but I have use LW many times in the past with no problems with both basic and pro.
Here are my details:

1. OS version? Windows XP home edition Service Pack 2
2. What firewalls you have? Windows (Turned off) and AOL safety security center ( Firewall is cofigured to allow Limewire )
3. How much ram? 768 ram
4. Hard Disk space available? I believe 18.8 GB free space
5. Connection type? (eg: dialup, broadband, cable, etc.) Cable
6. Modem & router brand name & model numbers? Modem - Motorola - SB5120
7. Where are you trying to connect from? House
8. What version of LimeWire (LW) & Java do you have? LW is 4.12.11 and Java is 1.6.0_01
9. Who is your ISP provider (Internet Service Provider)?Atlantic Broadband
10. Do this simple test for us. Test Worked
11. Are you sharing the connection with other computers or p2p sharing programs? If yes, please give details of set up. Nope computer is on own
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? Yes Firewall detected
http://www.gnutellaforums.com/attach...1&d=1158099342
14. For those using a modem/router, how is your modem/router set up...are you port forwarding or is UPnP enabled? Not really sure

I have uninstalled Java from contol panel < add or remove progams .
I have also uninstalled Limeware from Start < all programs < Limewire < uninstall.

I did not re-install them untill I restarted my computer and double checked for any Limewire by searching my files ( hidden files also )

I am still having the same issue though Please I need more assistance.