After two weeks trying everything, I can not arm my quad. Everything looks fine on the first window of the Mission planner. I can see the horizon and "GPS no fix " as it should read with Stabilize flight. The compass is working. All the process of the wizard has been made "successfully" Except that it doesn't arm.
This is the second quad that I've made. The first quad with the same kind of electronics is working fine.
What should I do? any suggestion will be appreciated. My system is a DX7s, AR8000, and a HK Mega Pilot 2.7