Firewall 2 in Suse 7.3

Hello ! I have a problem with Firewall 2 in Suse: 1. When i start the Firewall 2, other computers in the network can connect to the internet via ip masquerading, but the computer where the firewall runs, has no access to the internet ! 2. How is it possible to do not start personal-firewall at boot, because i think when i use firewall 2, it is not necessary to run personal-firewall ??? Thank you for help ! PHJ