Camera won't zoom out. (Stuck on zoom-in)

My typical method for zooming in and out with my camera is the scroll wheel on a mouse. My WoW crashed and I had to restart the comp and all that. Everytime I do that, my interface options either reset themselves or get screwed up.

My camera distance is set to max, but everytime I use the scroll wheel to zoom, it won't let me zoom out. I've scrolled all the way to first-person and got myself stuck there and unable to zoom out.

Is there some sort of "locked" button that's checked in my interface that's causing this problem?