Follow Mode - Copter

I used all the features. But the Follow mode does not work. Both the rover and the copter installed 4.0.3 Ardupilot. Telemetry with identical NETID is installed on the rover and copter. At the ground station, two vehicles are visible. Different SYSID_THISMAV are assigned to the rover and the copter (since the SYSID is both 1 by default), the FOLL_SYSID of the copter is selected in the SYSID rover settings. When you turn on the Follow mode, nothing happens. Does anyone have any ideas how to make this mode work?