Help! Quad Not Arming

Innaviation

Well-known member
So I finished my first DMSX quad and configured the arming switch in betaflight but it won't arm the motors. When plugged in and connected to the controller the FC will flash a few times when I flick the arm switch. I do know all the motors work when activated in the motors tab but it doesn't work with the controller.

I assume this is just a simple fix in betaflight but I definitely don't know how to solve this. Any thoughts would be great.