ChaserCamera looking problem

Ok.I have these settings:

props.put(ThirdPersonMouseLook.PROP_MOUSEBUTTON_FOR_LOOKING, "0");
        props.put(ChaseCamera.PROP_STAYBEHINDTARGET, true);
        props.put(ChaseCamera.PROP_MAINTAINAZIMUTH, true);

But when I have the button down It trys returning to staybehing target, how can I make it so that it doesnt have to stay behind the target when mouse buttons down?
And how can I set it to where its always DIRECTLY behind target?