AMP 2.6 (AC3.0.1) will not ARM

Hi,

after trying for hours i need your help.

I set up a quad copter on an H shaped frame with a new Ardupilot Mega 2.6 and external GPS

The Mission Planer connects fine and I did all the setup and calibrations.

I Firmware installed 3.0.1 Quad, selected H

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