Cant connect..here's my stats

[Sandy81676]

1. OS version? Mac OS X 10.4.11
2. What firewalls you have? None
3. How much ram? 1.5GB
4. Hard Disk space available? 80GB internal, 250GB & 500GB External
5. Connection type? cable
6. Modem & router brand name & model numbers? Motorola SB5120 Surfboard Modem
7. Where are you trying to connect from? House (Home)
8. What version of LimeWire (LW) & Java do you have? LW Pro 4.15.0 Java 1.5.0_07
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? Your Test Worked
11. Are you sharing the connection with other computers or p2p sharing programs? No
12. Is this a your 1st try at LW or is this a new problem with an experienced user. First time I had a problem, user for YEARS
13. Do you see a brick wall in front of the blue world icon at the bottom of LW's interface? Yes, though I've never used a firewall
14. For those using a modem/router, how is your modem/router set up...are you port forwarding or is UPnP enabled? I USED to have UPnP enabled but the posts I was reading was telling me to port forward. The most interesting thing I have found is that LW ALWAYS had port 6346 and now, even when I type 6346 in, LW changes the number after the required restart.
15. What security programs are you using (antivirus etc)? None, ever.
16. What country are you living in? US, New Jersey.

I have never had a problem connecting until 3 days ago. Comcast did something that caused me to lose connection for 5 minutes and I had to restart my airport express base stations in order to get on the internet again. Also, my husband's PC can't even CONNECT to the internet since Comcast's update. So, I personally think they added a firewall on their end but I have no idea what to do about it. I am clueless when it comes to networking beyond using the Aiport express utilities. And all of the fixes in these forums are Windows based and don't apply to Mac users. Please post a sticky if you find a fix.