I just bought a logitech mx revolution mouse and for some reason the middle scroll wheel will not support the pan feature in autocad when I press down on it. I'm not even sure the wheel is clickable. It zooms fine. So I want to set the thumb wheel on the mouse for pan which I've assigned to the F12 key in the mouse control software for. Now I need to set the pan keystroke on my keyboard for F12 but autocad 2009 will not let me do that. I am in the CUI and right clicking  on keyboard which brings up a temporary override option. When I try to drag and drop the pan feature up from the bottom window autocad will not let me drag into the upper window panel. Is there another way to do this?