I'm running AutoCAD 2005 LT on a Dell Inspiron 8200 w/ Windows XP. I often plug my Intellimouse optical mouse for work in the office. I had set the MBUTTONPAN variable to 1, yet I can't press the wheel and pan like at other computers. I'm not sure but I think it's a system registry setting. How can I get the wheel pressing to pan in AutoCAD?