The first time you setup the channel in the admin area, the message you post is normal. After you save the channel, you'll need to authenticate on the front-end with Facebook one more time. JFBConnect will detect that the user has a channel setup for them and will request the additional permission, like manage_pages, so that JFBConnect can post on their behalf.
I hope that helps, but if you still run into issues, please let us know.
Thanks,
Alex