I just finished building my first 250mm quad and I armed the motors, but they won't spin. I've tried calibrating the escs, but that didn't work. When I calibrate them through Baseflight, they beep at the top of the slider, beep at the bottom, then continue beeping consistently. I tried using each of the motors connected straight to the throttle of my receiver, and each of them spun up. I'm using BaseFlight on an AfroFlight Rev5 board, Castle 35A escs, Hobbysky 2204 2300kv brushless motors and a spektrum radio system.