title: insterstitial ads not showing from google admob after app is published
body: <p>Im using admob to dipslay ads on my game which is published on the play store. During the first 3 days the interstitial ads showed fine but now it just shows a black screen.</p>
  
  <p><a href="http://i.stack.imgur.com/jMk1A.png" rel="nofollow">What app shows instead of interstitial ad</a></p>
  
  <p>That is what the screen looks like. If you wanna see for yourself the game is delta shooter from delta productions inc</p>
  
  <p>So is this my fault or admobs fault?</p>
  
  <p>Banner ads work fine by the way</p>