I seem to have installed and authorised the plugin as required. I can see the settings and images in the post publish screen but when I re-publish the posts with only the 'Do not add link to Facebook' option unticked I cannot see the post on the FB page.
Plugin doesn't give me any errors, I have selected the correct page from the plugin settings, I am the admin of that page, I have also de-activated WP Super Cache in case that is the problem, but three posts that I tried so far failed to repost.
What could be the problem and how can I diagnose this? Also, could it be that your plugin only posts new posts 'after' it is installed?