title: Can not see banner - admob plugin
body: <p>I have a problem with the new admob plugin of corona-sdk platform.</p>
  
  <p>In one hand, I have an app that I already published to Google Play long time ago and yesterday I purchashed the new admob plugin, so I rebuild the app and add an ad banner using the new admob plugin - It worked propely.</p>
  
  <p>On the other hand, I have an app that I did not published yet (brand new), I tried to add a banner using the new admob plugin (the SAME way I did with the other app - same code same everything - also the build.setting).
  I can see an ad only if it's using TestMode=true.</p>
  
  <p>This is how I did it:
  I have the main.lua init the ad:</p>
  
  <pre><code>-- AdMob listener function
  local function adListener( event )
      if ( event.phase == "init" ) then  -- Successful initialization
          -- Load an AdMob interstitial ad
          admob.load( "banner", { adUnitId="ca-app-pub-xxxxx/xxxxx" } )
      end
  end
  
  -- Initialize the AdMob plugin
  admob.init( adListener, { appId="ca-app-pub-xxxxxx~xxxxxxx"} )
  </code></pre>
  
  <p>and in an scene I do this:</p>
  
  <pre><code>if ( admob.isLoaded( "banner" ) ) then
              bannerHeight = admob.height()
              admob.show( "banner", { y = display.actualContentHeight - bannerHeight} )
  end
  </code></pre>
  
  <p>I tried everything, I know the ad unit works because I check it on the first app that the banner works there.
  My only thought left is that maybe it's happenning becuase I didn't published the app yet..</p>
  
  <p>Hope for help, Thank you all.</p>