Arduboat throttle left and right not showing movement in servo output bars

I am making a pixhawk boat which has two motors which would I want them to work in a differential mode as I donot have any rudder.
In the configuration setting I set the class to boat. changed the output to type of servo to throttle left and right. I didnt connected the battery and just wanted to see if I get any movement of the bars in the servo output. I armed the boat but the throttle bar didnt moved with changing throttle. The green bar stayed the at the same position as shown:

Changing the function to ground steering allowed me to change the green bar. Why isnt it working with the throttle??? Kindly help me in case I am missing something.

Hi @m_farooq,

What mode was the autopilot in? My guess is that it was in Hold mode so the throttle wouldn’t move. Try Manual or Acro and it will probably work.

@rmackay9 it was in manual mode when I tried it

The issue has been solved. The safety button wasn’t pressed earlier.

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Hey @m_farooq I have the same problem now. I have turned of the safety switch, my robot is in manual mode and only ground steering works and not throttle left or right. What other settings did you use ?

Arm it.

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Thanks for the reply @Yuri_Rage. The issue was in the mode selection. I needed to have it in acro mode and not manual. I armed it as well but the robot does not work today. when I tried the same settings yesterday it was working fine. What can be the reason for that.