Replying to Limewire Problem

alright....so this might be really easy to fix, but for the past few months whenever i go to limewire at the bottom on the little globe there is a wall in front of it, which shows that a firewall is blocking limewire. usually this only stays like this for a few seconds and then limewire is connected and all that shit, but it just has been completely blocked by a firewall every time i go on. can i fix this or is it time for a new downloading program?