applescript maximize emacs

[Ramesh Thulasiram]

I'm using emacs on my mac, and I have to always maximize it when i open it. so 
I added the following to my .emacs file adding a shortcut for maximizing, but 
it doesn't seem to work. does anyone one know what is the problem here?


(defun mac-maximize ()
  (interactive)
  (do-applescript "try
    click button 2 of window 1
end try"))
(global-set-key (kbd "C-c r x") 'mac-maximize)


Thanks,
ramesh