ArduCopter V4.2.1 (c8b6b674) New build 5" Copter not arming and other problems

ArduCopter Copter 4.2
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Hi, I do need some thoughts and help with a new build small 5" copter. The firmware I use is ArduCopter V4.2.1 (c8b6b674) on a cube black at a mini carrier board.

5
51200×900 389 KB

As I cant get GPS runing I unchecked all pre arming settings and tried to arm.
All I get is a 2 tone double beep and the message “Command was denied by the autopilot”
I dont know to proceed…any help welcome!

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Safety switch is on - BRD_SAFETY*

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Hi andyp1per!
BRD_SAFETY_MASK
BRD’_SAFETYENABLE
BRD_SAFETYOPTION
is all set to “0”
I first time use these type of ESC`s
ESC
Is the connection with just the signal cable to the cube carrier board upper pin line and no extra gnd correct?

connection esc
connection esc1200×900 146 KB

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It should be marked on the case. On the CubeOrange its the lower pin. You can’t use dshot on PWM1-8 you need to use AUX1-6

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Purple Cube and Mini Carrier Board -3
Purple Cube and Mini Carrier Board -31306×934 129 KB

Looks like the pin orientation is opposite with the mini carrier board…RC signals are shown in the mission planner RC calibration tab, so I think this piture with upper pin line signal is okay?
In" ESC Calibration" I use “ESC Type: Normal” and did not change the settings.
Ok, now disabled the serial port 3, which was for GPS ublox and I can arm, but the motors dont run…instead I get loooong beep and the “Potential Thrust Loss (2)” message