After over 12 years of operation, my ISY994i system stopped working apparently because the PLM 2412s died. Status of PLM showed unable to communicate. I purchased a new PLM 2413s and have not been able to get the ISY994i and PLM to talk to each other. My ISY994i appears to be working, it still controls my one Zwave light. No insteon devices connect. Additionally, I am able to use the UDI IoX launcher to start up and open the Control Panel. I have turned off the ISY99i, plugged in the PLM, restarted the ISY994i and I get no communication between the two devices. From the control panel I've tried to reset the PLM and I get either a "Failed to Reset PLM" error message and sometimes a "Subscriber Connect Failure [0]" plus the Failed to Reset PLM. If I try to delete the PLM, it won't do it because it is not connected. I tried doing the reset PLM while having the PLM in Linking Mode (pressing LED button 4 seconds until it starts beeping) and running the Reset PLM. Nothing works. Any ideas?