You have a lot of firewall types there. Have you configured them? After LW's been open for say 30 mins do this test: Bug Report instructions & sample image If it's says false then it will either be or both the firewalls & your nat router. If you tell us the model number of your Linksys I'll see if I can find specific instructions for forwarding a port to allow LW access.

For your other firewalls see here: http://www.limewire.com/english/content/firewalls.shtml or an alternate for the norton is Configuring Norton Internet Security

You will also need to force ip within LW: Force IP instructions & sample image