Not sure how much more I can help without knowing more. Perhaps some system details will help: System details - help us to help you

When you enabled UPnP did it rid of the brick wall? If not, try changing the listening port to one between 49152 - 65535. A good one to try is 64049. ie: go to LimeWire's menu bar, Tool menu -> Options -> Advanced -> Firewalls & you'll see the options. You can see where from here Manual port forward instructions & sample image