Hi guys, I'm trying to get ruby-mode and html-mode to work together
with mmm-mode in .rhtml files, and I have a problem: the Ruby code is
not colored (syntax highlight).  Right now, I have this code in my
..emacs file for eruby:

;; eRuby
(require 'mmm-mode)
(setq mmm-global-mode 'maybe)
(setq mmm-submode-decoration-level 0)
(mmm-add-classes
 '((eruby
	:submode ruby-mode
 	:front "<%[=#]?"
 	:back "%>")))
(add-to-list 'auto-mode-alist '("\\.rhtml$" . html-mode))
(add-to-list 'mmm-mode-ext-classes-alist '(html-mode nil eruby))

Anything seems suspect to you?  Got an idea?  Oh, and if I set
mmm-submode-decoration-level to 1 or to 2, the Ruby code is
highlighted in a pale gray and I can't read anything anymore

Thanks for the tips.

Vincent