Not detect reciver xsr frsky

Hi, I’m new to this and I was setting my pix but when I start to set up my frsky qx7 but when moving the accelerator the cylinders (in Mission Planner) do not turn green. Does anyone know why it may be happening?
The receiver is correctly blind (green LED) and the sbus, gnd and 5v cable is connected to RC in.

Thanks for your help