[OS X Emacs] Org mode keymap problem

[Alan Schmitt]

Hello,

I have the following in my Preferences.el file:

(add-hook 'org-mode-hook
	  (lambda ()
	    (auto-fill-mode 1)
	    (define-key org-mode-map [kp-enter] 'org-meta-return)
	    (define-key org-mode-map [prior] 'org-metaup)
	    (define-key org-mode-map [next]  'org-metadown)
	    (define-key org-mode-map [home] 'org-metaleft)
	    (define-key org-mode-map [end] 'org-metaright)
	    ))

This allows me to use "fn" as my alt key and bypass the fact, for 
instance, that "fn up" is actually the "prior" key.

Unfortunately, for some reason, some of these key bindings do not work 
in org mode: the "prior" and "next" one are correctly bound, but the 
"home" and "end" one remain bound to "beginning-of-buffer" and 
"end-of-buffer".

Could someone give me a hand to try to figure this out? I'm using 
Aquamacs 2.4.

Thanks,

Alan