[wlug] Network Problem (SuSE 9.1)

I have just installed SuSE for the first time, including the firewall. The computer is connected to a small home network with 3 other Windows machines. I am trying to access the Windows machines, however, I get the error message "unable to find any workgroups". I can ping the machines and print via the the Windows machine. If I turn the firewall off, I can browse the network. If I turn the firewall on again after doing the browse, I am still able to access the Windows machines on the network. What do I need to change, so it sees the network without having to go through turning off/on the firewall each time I boot up? Thanks --- Felix