Hmmm...Well I'm not sure if your ISP has started to shape p2p, you could give them a ring and see...
You don't have a Nat Firewall in your Modem or Router...
So the beat I can advise you is to try all of the fixes I give you and cross your fingers one of them work...
Try one by one and see if it works...
Try uninstalling your Java from the add/remove programs and then re-install the JRE offline version....(5th one down)
http://java.sun.com/javase/downloads/index_jdk5.jsp
Then uninstall Limewire using the uninstaller which is found in start > all programs > limewire...then re-install it using the offline installer...
http://www.limewire.com/english/cont...oadfree2.shtml
If that does not help with your problem try deleting your preference folder...
http://www.gnutellaforums.com/showth...threadid=36420
Try right-clicking the Limewire icon and going to properties and change compatability setting to Windows 2000. (but only if you're using Windows 2000 or later.) Somebody reported changing to Windows NT compatibility fixed their problem despite not using that operating system version.
If all that fails try downloading the Beta Version of Limewire...