NetLinx turn on password by itself
I have installed an old NetLinx system with NXC-ME260 for a few years. My client use the web interface to control lights and thermostats. About a week ago, the web interface start asking for user name and password. I use two other computers and end up with the same. I tried Telnet and serial port via Studio, same prompt for user name and password. The program seems to be running, other touch panels are working. Any suggestions?