Press the control key, then spin the wheel on your mouse.
I see! I was doing it wrong.
I've been trying to spin my control key and press the wheel on my mouse. I've gone through nearly all my spare keyboards. Sure glad you cleared that up! ;)
(P.S. For those who didn't catch it, an earlier post on this thread from JimRob makes it clear that it was an oops on his part that caused the temporary wierdness)