I'm behind a firewall because I'm behind a router. The PC hasn't had any issues with Limewire, it works on it. The Macbook is the one I'm having issues with.

1. OS version? Mac OSX 10.5.4
2. What firewalls you have? None software, but I am behind a router.
3. How much ram? 2 gigs
4. Hard Disk space available? 115 gigs
5. Connection type? (eg: dialup, broadband, cable, etc.) broadband
6. Modem & router brand name & model numbers? Modem is a Scientific Atlanta, router is a Belkin F5D7230-4
7. Where are you trying to connect from (house, appartment complex, school, student accomodation, work, etc.)? Home
8. What version of LimeWire (LW) & Java do you have? (Go to LW's menu Help>About LW...) Will show both LW & Java version. Limewire Pro 4.18.3, Java 1.5.0_13
9. Who is your ISP (Internet Service Provider)? Comcast
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? Doesn't Work
11. Are you sharing the connection with other computers or p2p sharing programs? If yes, please give details of set up. Yes, a wireless router has a Vista PC connected to it by ethernet and 2 laptops, one an XP and one a Macbook, by wireless. Limewire works on the Vista PC, isn't installed on the XP laptop, and won't work on the Macbook
12. Is this a your 1st try at LW or is this a new problem with an experienced user. Not my first try, I've been using Limewire for a while, but it is my first time using it on a Mac.
13. Do you see a brick wall in front of the blue world icon at the bottom of LW's interface? Yes
14. For those using a modem/router, how is your modem/router set up...are you port forwarding or is UPnP enabled? I've tried both and neither method works. On my PC though, I'm using UPnP.
15. What security programs are you using (antivirus etc)? None
16. What country are you living in? USA