Can´t turn my aircraft.. HELP!!!

I can´t bank my aircraft to the left or right. I´ve tried the assignments but it won´t work.. Can anyone help me...

Thanks in advance

Are you using the keyboard, joystick or yoke?

Make sure you didn't hit the "Z" key and lock it.

I´m using a Keyboard and my autopilot is not turned on, sometimes i´m using a joystick but it´s to sensitive, I don´t want it so sensitive.