[away3d] when HoverCamera3D.hover()==false?

[metSyS]

I can't understand? when the hover() returns false? I need something
like this:

private function onEnterFrame(e:Event):void
{
camPan=-((mouseX-(stage.stageWidth/2))*0.07)+1;
camTitl=-((mouseY-(stage.stageHeight/2))*0.01);

if (cam.hover()==true)
{
        cam.panAngle=camPan;
        cam.tiltAngle=camTitl;
        cam.hover()

        view.render();
}
}

but cam.hover() is always return true? event when the mouse doesn't
move.