Grenades are like RAM, you can never have too much
Be sure to open these ports
TCP port 80, TCP port 3074, UDP port 88 ,UDP and TCP port 53 and TCP port 443.
If you dont know what that means, google port forwarding.
Also be sure to make exeptions in windows firewall.
[Edited on 03.20.2011 11:53 AM PDT]