telemetry module does not appear in mission planner

after connecting the FPV radio telemetry air in the pixhawk (Telem 1) and connecting the FPV Radio Telemetry Ground in the computer, and installing the controller with silicon Labs CP210x, I still don’t see the port in the mission planner (COM 3).

If someone could help me, it would help me a lot.
thanks
Ricard Pozo