Autoload failed to define function mwheel-install

[Bob Marcum <bmarcum@Houston.rr.com>]

I received this message upon starting up emacs after upgrading from RedHat 7.1 to
Fedora Core 3, now using emacs 21.3.  I struggled for a while trying to determine
a solution.  A search using google for this error message found one person's
experience which gave some guidance.

I solved this problem by including the line (load
"usr/share/emacs/21.3/lisp/mwheel.elc") as the first line in my .emacs startup
file.

I know this is surely not the _right_ way to solve this problem.  This following
line should have solved the problem, but it doesn't.
( autoload 'mwheel-install "mwheel" "Enable mouse wheel support" t)
(mwheel-install)

I would have thought emacs would look in /usr/share/emacs/21.3 and all of its
directories to find mwheel.elc and resolve the reference to mwheel in the
autoload statement, but it did not.

Is this a bug or just some configuration error I have?

I post this for others who may encounter this error message.