The Lighting Controller

I must be doing something wrong? I select a fixture in the 3d window, highlight Orientation, then type in different values. When trying to change the pan, values are ignored. Clicking on the slider has no result.
Any ideas what I am doing wrong?
Editing the x,y,z values in the 3d ini file works ok.
Much obliged for any assistance.

Try to click in another gadget, in order the focus leaves the "edit" gadget, then you should be able to use the slider.