Yes your observation seems to back up what we've found. See ISP's known to BLOCK or Filter p2p or specifically Limewire The only answer we can think of is to try a proxy. But proxies can take time to set up & you may need to try out quite a few proxy numbers before you find one that works. Or even try different types of proxies. See these links:
1. A Fix for those whose ISP's block Limewire pages 1 & 2 which has a link to alternative instructions.

2. Another Insight proxy solution

3. http proxies

4. A Successful http Proxy Solution

* Also see this: http://www.gnutellaforums.com/showth...threadid=37404 re: blocked ports & what you can try.