PHOTON uses specific network ports to synchronize data and transmit Show Control commands through a Server Group. Make sure the network ports on your servers match. On each server, select {Settings > Network tab} or press [Alt+S] and select the Network tab. The window will display the port numbers corresponding to Time Sync, Data Sync and Show Control. Each of these port numbers should be the same across your Server Group; with each port you should see the same number for Time Sync, Data Sync and Show Control. If the port numbers don’t match, you can reset them to Default by clicking on the [Reset] button or you can manually modify them by typing new values into their corresponding text boxes. If you change any of the port numbers, PHOTON will have to be restarted on all of the servers in the Server Group.