Thanks for your answer.
But, as I said, I barely touch the controls (joystick) and the helo responds extremely to a small input. So much so, that when I use the collective to take off, it is impossible to make a landing afterwards. The helo just goes up and up.
Same thing for the cyclic. An extremely small input on the stick makes the bird bouncing all around, out of control. The thing is just unflyable.
The joystick sensitivity is adjusted foe Max stability.
What puzzles me is that the planes, however, are flown easily, with the same sensivity settings.