I have to add my voice to the other here. If it is within your control (and it is since it's your own network) alway use static addresses. I used to have a BESFR41 connecting an A4000, two win boxs and a power mac. The A4000 was the samba workgroup/domain controller. Even if you choose to use dynamic addresses you should still set the gateway as the static address of the router and the subdomain should be static. The main reason to use the static addresses when dealing with an Amiga and samba is your have to define the Database/Hosts with the computers on your network. Lastly, did you try to ping the router from the Amiga?
