Just to be sure, it says you should move the roll control. You see that some channel or other is active and moving (only when moving the stick), but you don't see the roll stick picture on the screen move at all.
You might try making a completely reset transmitter model. Set it for normal airplane (not heli), sometimes called acro. Then make sure you have a flight switch configured in. Test it with a servo to make sure all the channels work as expected.
Of course PWM requires that you have a plug in the receiver for each channel you want to use.