WPMU Ultimate Facebook open graph image not working


I've already placed the image I want to be displayed everywhere I can in the plugin's settings, in the specific page settings (that box at the sidebar for the open graph), but the image being displayed is still the wrong one:

You can find at Facebook open graph object debugger that there're some errors being accused for that page.

You'll probably need to access my site for this one. I've sent my credentials 1-2 weeks ago, with Adam's name on it.