These are the two steps I would recommend next:
1. On Facebook.com, log in as your channel owner. Then navigate to your list of approved apps (also found at
www.facebook.com/settings?tab=applications ). Remove your application from the list so that when you log in from your website, it will force the approvals to be requested again. Then log out on the front-end of your site and log in again with the FB credentials of the channel owner. There should now be prompts to approve the application, manage pages, etc again. Please accept them. Go into the backend channel edit area and refresh the channel. Are there error messages still?
2. What version of JFBConnect are you using? The last version that you ran autotune for was 7.0.4. Looking at your page, there are some Facebook scope permissions that are deprecated that we no longer request in JFBConnect. Maybe JFBConnect is requesting outdated/unsupported permissions with your version of the Graph API.
-Melissa