I set up the IDs of my servos with Dynamixel Wizard 2 one-by-one with U2D2 USB communication converter.

I built my PhantomX-Reactor and connected all servos. My power jumper towards in on 'VIN'. I have the 12V 5A adaptor.
I scanned again the servos with Dynamixel and U2D2. The scan works. I can see my AX-12A servos.

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I uploaded the ArbotixBlink sketch from Arduino 1.8.10 to my Arbotix-M card. That works.

I uploaded AXSimpleTest sketch -> "Done compiling" -> "Done uploading". Nothing moves.
I uploaded dxlServoScan. Compiling and uploading works but I have the message in the serial monitor :
Servo ID : Error Bit
1:No Servo Found
2:No Servo Found
3:No Servo Found

I tried a lot of sketchs and my servo ID 1 is never found. What do I have to check ? I really need help please.