title: onFailedToReceiveAd(Ad request successful, but no ad returned due to lack of ad inventory when using admob with adwhirl
body: <p>i just want to know if this problem is server side...or i must fix something in my code... </p>
  
  <p>onFailedToReceiveAd(Ad request successful, but no ad returned due to lack of ad inventory</p>
  
  <p>I'm using admob with adwhirl to show ads in my android application.</p>