DSL problem

I just got DSL today. The modem is working from the server with only minor annoyances. However, I can't seem to access the internet from other linux (9.0) I'm suspecting some kind of a routing/gateway problem. I had to change the IP for my server box to 192.168.0.2 from 192.168.0.1 because the modem wants to be 192.168.0.1. I added a 2nd NIC as 192.168.0.3. I've setup the gateway on all my boxes as 192.168.0.2 I can ping everything on my internal network, but everything outside gets errors (unable to find host) Any clues?? Thanks, Jim