Mission planner not responding to stick movements of transmitter

Hello , I am currently using a fly sky 6i tx with FS- ia6b receiver , and an arducopter 2.8 flight controller , i am constantly facing the issue that mission planner is not responding to sticks movements in the radio calibration setup . I am in urgent need of help . please provide information if anyone has any idea about this .

Good day, are you using sbus?? if yes check the connection from the receiver to the rc in port of your flight controller