[Lilux-help] using cups with different subnets

Hi, I'm currently trying to share my printer using cups. Setup: Router 1: internal: 192.168.178.1/24 external: ADSL dynamic Client: connected to router 1, IP 192.168.178.22/24 Kubuntu 6.10 Router 2: WAN connected to router 1, Wan-IP 192.168.178.2/24 Lan-IP 192.168.1.1/24 Server connected to router 2, IP 192.168.1.2/24 Kubunu 7.04 Routing configured on router 1 and 2, ping client--> server an server-->client works. However I'm unable to see the shared printer on the client. Is there sth special to configure in cupsd.conf to get it working across different subnets? while client+server were on the same subnet it worked great. greetings Jang