I was able to complete the steps for Ultimate Facebook setup. I supplied the API key and Secret Key and saved the changes. A green checkmark appeared next to the phrase 'Successfully connected to UOC-Connect' in the Facebook API section.
I advanced to the Permissions and Tokens section where it warned me that, 'some parts of the plugin will require you to grant them extended permissions on Facebook. If you haven't done so already, it is highly recommended you do so now:' and provided a link that, when clicked, took me back to the Facebook API section.
The first time I think it did have me approve permissions, which I did.
Now when I go to a post page, the Facebook Publishing section says, 'Your app doesn't have enough permissions to publish on Facebook', and offers the same link that takes me to the same place.
Beyond that, on the Publish to wall of this Facebook account, it only shows me my personal page and NOT the organization page to which I need to publish.
I've read Kimberly's guide (she is with WPMU and the link in the Facebook API section took me there, as well as the associated post, with screen shots, from Mac at WPMU.
What do I need to do to be able to 'grant permissions' such that I can post from a WordPress post to Facebook on an organizational account. I know this is possible because I have setup two other clients with this plug-in successfully.