I am having the same problem. I am behind a firewall as well but I never used to have this problem. Started with the last upgrade. I have Windows XP, cable internet. Limewire is the exception to the firewall and yet it still puts me behind the firewall. I have tried disconnecting, waiting and then reconnecting. This worked the first day but now it will not work. I want to upgrade to Pro but not if I am going to be having these problems. Can someone from Limewire please help?