im also having the same problem. i recently created a new account on my computer. and when i installed limewire on the new account it wouldnt work, i got the loopback connections message. I un in stalled then re installed, but with the same result, so i did a system restore but it still didnt work. I once again created an account re installed it and it STILL doesnt work. Note: i used it on the previous account with no problems.

1. OS version? Windows XP Office
2. What firewalls you have? Windows
3. How much ram? dont know
4. Hard Disk space available? 189 GB i think
5. Connection type? (eg: dialup, broadband, cable, etc.) home network
6. Modem & router brand name & model numbers? dont know
7. Where are you trying to connect from (house, appartment complex, school, student accomodation, work, etc.)? house
8. What version of LimeWire (LW) & Java do you have? (Go to LW's menu Help>About LW...) Will show both LW & Java version. 4.12.11 dont know java because LW will not open at all
9. Who is your ISP provider (Internet Service Provider)? Verizon/AOL
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? test worked
11. Are you sharing the connection with other computers or p2p sharing programs? If yes, please give details of set up. Yes, home Network with 2 desktops and 2 laptops
12. Is this a your 1st try at LW or is this a new problem with an experienced user. new problem with experienced user
13. Do you see a brick wall in front of the blue world icon at the bottom of LW's interface? no, but thier is one on the windows firewall icon, even though i set the firewall to off, it still says on,