@ MrsHappy

In the Kerio Firewall did you allow Limewire full access?

You may have to put advanced rules into Kerio as well.

In Limewire go to Tools-->Options-->Advanced-->Firewall config Tell us your settings there.

Also try adding the listening port number to advanced rules in Kerio (Both TCP and UDP)

Also are you absolutely sure that the NTL Modem is only a modem (no firewall) and not a router (Routers often have internal firewalls)