title: Aggregations not working in Facebook Open Graph Timeline App
body: <p>I've followed this tutorial step by step: <a href="http://developers.facebook.com/docs/beta/opengraph/tutorial/" rel="nofollow">http://developers.facebook.com/docs/beta/opengraph/tutorial/</a></p>
  
  <p>The only problem is when I try to submit an action for approval it says:</p>
  
  <p><b>No Aggregations created for this Action Type. Please create a completed Aggregation populated with sample data before submitting for review.</b></p>
  
  <p>The thing is a have set up an Aggregation. When I click the <b>Preview</b> link it just shows a Loading screen and then disappears. I've checked the Aggregation setup many times with different configuration. Nothing seems to work.</p>
  
  <p>Any help would be appreciated. </p>