iAds for iPhone and iPad

I've included the below code into my app. When the screen comes up, it shows that I'm connected to iAd, but unlike other ad networks, I never see any ads. Only the messages saying that I'm connected to the iAd network and click here for more info.

Is this normal?

Is there any work that needs to be done in ITunesConnect.com? (I couldn't find any info on this)

Any response will be greatly appreciated as I've completed my app and I'm ready to submit it to the App Store.

var iads = Ti.UI.iOS.createAdView({
        width: 'auto',
        height: 'auto',
        bottom: 0,
        borderColor: '#000000',
        zIndex:1000,
        backgroundColor: '#000000'}); 
 
        t1 = Titanium.UI.createAnimation({bottom:0, duration:750}); 
 
        iads.addEventListener('load', function(){
            iads.animate(t1);
        }); 
    win.add(iads);