Telemetry connection

Hi there
I am updated my pixhawk with copter 3.6.0 but when I am trying to connect the mission planner with the 433 MHz telemetry it is not connecting .
Can u suggest any solution.
Thank you

When I installed the 3.6.0 firmware windows changed the COM port. in mission planner Try re selecting the com port and then connect

Thank you sir
It is working good now.

was it the com port?