[Plugin: Instapress] Feed Shortcode – Text Displayed on Page

Hi All, fairly new to WP and probably a simple solution.

http://justjonet.com/home/photos/

Why is the shortcode text displayed and not the actual feed I’d expect to see? Text is also shown in the visual page preview.

I’ve tried:
– inserting shortcode into HTML directly.
– disabling all other plugins
– re-installing instapress

Other WordPress shortcodes are working properly on the page linked above.

Thanks in advance.

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