Change the listening port in LW to 6346. Else change the OSX firewall to port 28088. I'd try 6346 1st.

Good to hear at least you have it installed. That's a start!

Is your computer a G5? I presume with DDR ram it is. And is it a desktop model or ibook or imac, etc.?

BTW a firewall in OSX is "arguably" not really necessary. I rarely have mine turned on. Only if I'm browsing some possibly suspect sites will I turn it on. But that's me. Something about the mac community I think. Not quite as paranoid as windows users.