Hrm...when I had my two systems shared: I had Zone Alarm as a firewall and 'denied the Poser exe access to the web', that seemed to take care of the program searching the network for like serials. I was able to get load/save .pz3's from my shared computer, although I never tried to set it up so it would access the Runtime off the other system (its probably possible somehow), and of course Poser can't do network rendering like Bryce, etc. I've no idea how your LAN is setup and I'm at all tech inclined, just throwing out my simple fix in case it helps...good luck! :o)