Ardupilot omnibus f4 v3 noheartbeat packets recieved

Can anyone help me with omnibus F4 V3 flight controller “noheartbeat packet recieved” problem within ardupilot mission planner connection. it is very stressfull since i have double check the COM PORT, Testing all possible BAUDRATE and USB PORT [on my computer]. i have brand new F4 V3 flight controller board, tried betaflight connection no problem at all. all great within betaflight connection. now i tried mission planner then that problem appear, this is very confusing. I’ve search tons of video on you tube can’t find the answer.

i suspect if new FC board you have betaflight on it, im positive you need to take a look at this
Loading Firmware onto boards without existing ArduPilot firmware — Mission Planner documentation

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