I am running Win2K without a firewall. Multiplicity used to work, but I rebooted after some Windows update, and it stopped working.
In task manager, I see MULTIP~2.exe, but nothing in my toolbox. No splash screen either. I have uninstalled, searched and destroyed any multip* in my registry, and reinstalled multiple times. It goes through the setup - sees my other computer - then beeps but does not appear in my toolbox. And, it does not work. Nothing suspicious in the event log.