sharing photos via facebook icon

Hi
I’ve installed nextgen pro as part of the photocrati theme. When I click on the icon to share a photo on facebook the resulting post isn’t displaying the photo on FB. I’ve tried creating a FB app and entering the app details in the gallery setup but it’s still not working.
Does anyone have any suggestions?

Thanks

Kevin
http://www.smokinimages.co.uk

https://wordpress.org/plugins/nextgen-gallery/