Working with 4 monitors, I keep the Mixing Console opened at all times, but on a monitor that is the furthest away from my primary monitor so I place the Preview fader conveniently docked alongside my preview window.

But something got reset in my configurations and I can't figure out what it is.

Whenever I attempt to slide the preview or Master fader of the Master Bus window up or down, Vegas 13 will freeze and the only way I can release it is to switch to another application and return. As soon as I touch one of the two faders the freeze up happens all over again, so the Master Bus has become useless to me. Does anyone have an idea what I should do to get out of this pickle?.