gravity forms product add-ons panel does not display on product page.
I've tried de-activating and re-activating the plug-in... no dice.
I followed the instruction here: http://wcdocs.woothemes.com/user-guide/extensions/woocommerce-gravity-forms-product-addons/
but I can't see the panel.
Woocommerce status confirms that the extensions is working. I checked 'screen options' to see if the panel is hidden. it just won't show up.