Gnutella Forums - Another brick wall where there shouldn't be . . .

Hi. I've just downloaded & installed LW and it won't connect. It shows the brick wall icon, but I can't figure out why. Here's my info:

1. OS version? (eg: Windows 98) Win XP Home SP2
2. What firewalls you have? ZoneAlarm
3. How much ram? 256 MB
4. Hard Disk space available? Programs: 26 GB, Data: 126 GB
5. Connection type? (eg: dialup, broadband, cable, etc.) Broadband
6. Modem & router brand name & model numbers? Modem: unknown, Router: D-Link DI-624
7. Where are you trying to connect from (house, appartment complex, school, student accomodation, work, etc.)? school/residence w/ central modem
8. What version of LimeWire (LW) & Java do you have? (Go to LW's menu Help>About LW...) Will show both LW & Java version. LW 4.12.15, Java 1.5.0_11
9. Who is your ISP (Internet Service Provider)? Unknown
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. Connection from building is shared, but I'm not connecting through another computer
12. Is this a your 1st try at LW or is this a new problem with an experienced user. 1st try
13. Do you see a brick wall in front of the blue world icon at the bottom of LW's interface?
http://www.gnutellaforums.com/attach...1&d=1158099342 Yes
14. For those using a modem/router, how is your modem/router set up...are you port forwarding or is UPnP enabled? Modem: unknown, but a friend connected through it with no problems. Router: bypassed
15. What security programs are you using (antivirus etc)? Some people might not be aware that their security suite includes a firewall :) Avast!, ZoneAlarm
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

I've never used Windows Security, I turned ZoneAlarm and Avast! off, and I bypassed the router. This only leaves the modem and ISP, but as I noted above, one of my friends here uses LW with no problems. I don't know what else to try.

Thanks.

Steven