We have multiple Win XP machines on site on 2 different subnets. We recently upgraded our UltraVNC software from version 1.0.2 to 1.0.5. We added the software to our PC image so that when we reimage a machine, VNC is installed and we can remote connect to it. Unfortunately, unless the reimaged PC is on the same subnet as the computer we're connecting from, we cannot connect to the computer.
Any ideas where to look? Firewall ports are open on the reimaged machines. We're clearly missing a step in the setup that we lost in the upgrade.