[Orgmode] Can't find LaTeX under MAC

[Chao LU]

Dear all,

I'm trying to use org-mode under MAC, and when I export to html, some fragments of LaTeX needs to be converted. So I got the texlive installed and then put these lines into my .emacs:

8<------------------------>8

(defconst lch-mac-p (eq window-system 'mac) "Are we on Mac")
(if lch-mac-p
    (progn
      (setenv "PATH" (concat "/usr/local/texlive/2010/bin/universal-darwin:" (getenv "PATH")))

      (setq exec-path (append exec-path '("/usr/local/bin" "/usr/local/texlive/2010/bin/universal-darwin:")))
      )
    )

8<------------------------->8

But seems not work, org still can't find where the LaTeX is. Could anyone give me a hint?

Thanks in advance ^.^

Chao