[Plugin: Formidable Forms] Form not rendered

Noobishly trying to add some form to an existing (heavily customized) site… The form doesn’t render, the page just shows the shortcode:

[formidable id=2]

Even if I add it through the “Add Formidable Form” icon when editing the page.

Any ideas?

Thanks,
Z

http://wordpress.org/extend/plugins/formidable/