[AUCTeX] font lock user-defined commands

[Hans Halvorson]

Regarding font-locking of user-defined commands, I have tried to
follow the instructions in the manual, and I am still unable to get it
to work.  

As a test, I am trying to get "\defin" to highlight.  I have tried
both of the following in the custom variables in my .emacs:

(font-latex-user-keyword-classes (quote (("defin" ("defin") (:foreground 
"cyan") (command 1)))))

(font-latex-match-bold-command-keywords '("defin"))

Neither of these is making any difference -- "\defin" and
"\defin{foobar}" are still showing up in light gray.  What am I doing
wrong here?  (I am running AucTeX 11.84 on Emacs CVS 22.1.50.)

Thanks,
Hans