I had a similar problem when I installed it. All I did was allow full access to the program through my firewall and after running it awhile I monitored the port traffic to find out which ones it was using. After finding this out I configured my firewall as such to allow traffic and connection.
I have since uninstalled it so I don't remember the ports to allow
At the time it had poor content because it lacked users but it seems to be picking at a rather steady pace. Sorry I can't be of much more help but I should have you going in the right direction anyway?
[EDIT]Looks as if Napho beat me too it
