7.3 & Mouse Scroll Wheel Enhancements

[who]

I can't get the vertical audio zoom to work using the Atl+Shift+Mouse Wheel combo. Am I missing something? (Please don't tell me this is one of those TDM features.)

Mouse Scroll Wheel
Enhancements
In Pro Tools 7.3, some of the key commands for
scrolling with a mouse scroll wheel have
changed.
To continuously zoom in the Edit window
(horizontal zoom):
■ Hold Alt (Windows) or Option (Mac) while
turning the mouse scroll wheel.
To continuously zoom audio (vertical zoom) in the
Edit window:
■ Hold Alt+Shift (Windows) or Option+Shift
(Mac) while turning the mouse scroll wheel.
To continuously zoom MIDI (vertical zoom) in the
Edit window:
■ Hold Alt+Start (Windows) or Option+Control
(Mac) while turning the mouse scroll wheel.
To scroll the contents of the Edit window or Mix
window horizontally:
1 Focus the window you want to scroll by clicking
in it or bringing it forward.
2 Hold the Shift key while turning the mouse
scroll wheel.