I USE THE ardupilot 4.4.3 connect to the QGC 4.4.0 , it only read the SLCAN port , the mavlink port doesnt show in serial port in qgc

QGroundControl
1

I USE THE ardupilot 4.4.3 connect to the QGC 4.4.0 , it only read the SLCAN port , the mavlink port doesnt show in serial port in qgc
i can read the port by the mission planner,

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but in the qgc , it only show the SLCAN port
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image621×515 37.9 KB

what is the problem for the QGC 4.4.0 , how can i fix the QGC by the qt creator