First, Make sure all items are on the same Frequency, and different channels. If you have both on Channel 1, for example, then only one channel will be displayed.
Once you ensure everything is set to proper frequency and channel, enter the SETUP screen of the Cyber Commander. Do not go to spec lights, rather go to OPEN MEMORY, press in with the right joystick. With the left joystick, scroll to STUDIO. (the options here are <...SD49, SD50, Internal 1, Internal 2, STUDIO, CH1, CH2...SD1, SD2...>)
Once at STUDIO, press in with the right joystick, and both lights should appear. You can now scroll right to the main screen.