BrickWalled!! (Leopard)

Just made the switch to Mac a week ago. After installing Limewire Basic, I could not connect. I would get one green line and the little world had a brick wall in front of it. I thought, maybe if I buy the Limewire Pro version this won't happen. I bought it and nothing changed. I have read a lot of the threads on this board regarding connection problems but the instructions to configure mac firewalls are not in accord with the settings and windows I see. For example, I cannot get to firewall connections by going to preferences>internet & network>sharing. Their is no firewall option there. Is there an updated Leopard way of doing this and not have a connection problem? If there is another thread regarding this please link me to it. I have been searching for a while now.


Thanks