Just my input. I had to uninstall Zonealarm, get the network working, then install ZA. Disable didn't work.
This ZA issue really bugs me as I've experienced it some hundred plus times.
First hiccup after SP2 (no probs before) occasionally need to connect workstation and a laptop with crossover cat5 cable-pre sp2 I could just turn off IE firewall, zonealarm firewall, search fot the other computer by name and ( having already set sharing) it would come right up, now with SP2 I have missed something between the lines of opening a port? or setting a port-Pointers desired-solicited.. TIA, all units have good WWW connectivity, ( I set firewalls back on after attempts-etc....ordinary NIC interface,etc-)