I have Limewire Pro 4.9.23 Are you saying that the Chat function will not work with this version?

I also do not seem to be able to "Direct Connect" to a friend of mone across town. There's a note on the tab saying that I am behind a firewall, and therefore cannot accept a direct connection. I am running Comodo Firewall, ann Limewire works just fine. How can I get around this?