Hi all,

i'm using emacs-23.1 and org-mode 6.35i and trying to export as PDF the beamer document from the Beamer tutorial http://orgmode.org/worg/org-tutorials/org-beamer.php
but i get the following error:

org-export-latex-set-initial-vars: No definition for class `beamer' in `org-export-latex-classes'

Can you please help me on this front?

Thanks,
Rares