i cant control throttle with force 3d pro

hello ,
i've just bought the force 3d pro.
all the buttons are working properly but i have a problem with the thrust button in the fsx game.
when i start a flight (and the throttle button is all the way back) the thrust is not on idle. is almost on 25% and the plane is moving. when i try to throttle up a little the power of the engines goes suddenly to 70%.
also when i push the throttle button all the way front the engines doesn't reach full thrust. only 87%. so i need to use the keyboard buttons which is not the best for me.
can anybody help me please?
i've just bought the force 3d pro.
all the buttons are working properly but i have a problem with the thrust button in the fsx game.
when i start a flight (and the throttle button is all the way back) the thrust is not on idle. is almost on 25% and the plane is moving. when i try to throttle up a little the power of the engines goes suddenly to 70%.
also when i push the throttle button all the way front the engines doesn't reach full thrust. only 87%. so i need to use the keyboard buttons which is not the best for me.
can anybody help me please?