How to get desktop to rotate with mouse wheel

[stan]

I have a 9.04 primary workstation that I have added compiz to, and grown to
depend on the desktop rotate using the mouse scroll wheel functionality.

I am building 2 new 9.10 machines, and I have a bit of a problem
replicating this behavior. I have set the settings the same in the compiz
settings manager, and I have made certain that I have 4 workspaces. The
mouse scroll wheel works to scroll back in terminal sessions, and in
Firfox.

Whee do I start troubleshooting this?

-- 
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?