Here is a link for further information and explanations about Firewall and Port configuration and selection...
>
User Cant Connect - LimeWire
for the LimeWire Firewalls Support page.
Read all of it and be certain to scroll down to the very bottom...
And, do examine the information in the thread available by clicking on >
Alternate PORTS
in my 'sig' below
Check if you are able to use Port 6346 by clicking on >
Port :6346 - Test If It Is 'Blocked'
also in my 'sig'.