Arudino Mega + Flysky FS-CT6B

[guru2018]

Hello,
I am using Flysky FS-CT6B , with arduino mega 2560. Connected ch1 - c4 of rx to analog pin 8 to 11 of arduino.
The Quad was not getting Armed. If i check in the MultiWiiConf throttle, Aileron, Elevator and Rudder values were just fluctuating and no inputs were taken from tx.

What may be the problem. Let me know if any one need any more information.

[guru2018]

Same issue in this thread viewtopic.php?f=13&t=6351

Forget to connect the ground. Now every thing is fine.