Joystick Problems!

So I have a Logitech Extreme 3D pro and my problem is with the throttle.

I doen't go from 0-100% it only goes from 50-100%. So in say, War thunder, I push my throttle lever to the bottom and instead of going to zero it only goes to 50, nothing lower. And when I push the throttle foward it goes to 100.

I really want the full range of throttle and if you know how i could fix it please let me know!

You may need to calibrate the controller.

Please actually tell me how to.

Logitech profiler - http://www.logitech.com/en-us/support/extreme-3d-pro?osid=14&bit=64

and this video - https://www.youtube.com/watch?v=6oKMw4wUR38