Font locking in emacs 22.2.1

I have 2 linux computers running the same version of ACL 8.0, but one
has GNU Emacs version 21.4.1, and another has GNU Emacs version 22.2.

On Emacs 21, my common lisp buffer is fontified, so it's easy to see
warnings when I am compiling, strings are highlighted, etc. Buffer is
fontified automatically as I type in commands.

On Emacs 22, I get no fontification. If I do "M-x font-lock-mode",
nothing changes. If I do "M-x font-lock-fontify-buffer", buffer gets
colors and highlighting up for everything that is already there, but
the new things that are printed don't get any colors. So I have to
keep re-doing "fontify-buffer".

Has anyone encountered this and knows how to fix it? My .emacs files
are the same on both computers, so there are no differences in
configuration that I am aware of, and it must be some change in Emacs
22 that is causing it.

Myrosia