Lost ability to pan with new Logitech mouse

#1
I hope I'm just missing something real obvious, but I just bought a new logitech mouse (LX5) and I can't pan with button 3. This button 3 is a scroll wheel, a button and a left/right scroll all in one. The scroll wheel zooms in and out and the left/right scroll does so (with scroll bars turned on, but depressing the button doesn't do anything. It should give me pan. mbuttonpan is turned on.
Any help greatly appreciated.
Thanks.
Paul Egan.

#3
Thanks John.
I got it figured out. I had to set it as a "generic button", intellicad does the rest.
I can't believe how complicated this new mouse is. There must be a thousand options for button 3.
Regards,
Paul Egan.