Question about TechniSat Technician K4 ISIO

How can I control 2 devices with 2 remote controls independently of each other? I have found out that you can switch back and forth between "sat 1" and "sat 2" on the remote control; however, neither of the two devices reacts to sat 2. Is it necessary to make a setting on the receiver itself? The device must "know" that it should react to sat 2. Best regards, Nobby