why does the simulator keep calling bannerView: didFailToReceiveAdWithError

Question

I've built a few apps that correctly implemented iAds. The apps are live in the app store and ads are being shown. I now can NOT get any app (including the ones that once worked correctly) to display an iAd on the device or the simulator. I'm wondering if there is a glitch in xcode or something odd is going on. Perhaps I'm just overlooking something obvious. I've done the following:

1) linked Binary with iAd.framework

2) #import <iAd/iAd.h>

3) #import <iAd/AdBannerView.h>

4) @interface RSBViewController :UIViewController <AdBannerViewDelegate>

5) added a AdBannerView object by my view controller on the storyboard

6) connected my AdBannerView to

  @propery (nonatomic, retain) IBOutlet ADBannerView *aBanner;

7) in the viewDidLoad method I did set the delegate like this:

  _aBanner.delegate = self

8) I've implemented -(void)bannerViewDidLoadAd:(AdBannerView *) banner like this:

-(void)bannerViewDidLoadAd:(ADBannerView *)banner
{
NSLog(@"Loading iAd");
if (!self.bannerIsVisible) {
    [UIView beginAnimations:@"animateAdBannerOn" context:NULL]; banner.frame =    CGRectOffset(banner.frame, 0, banner.frame.size.height);
    [UIView commitAnimations]; self.bannerIsVisible = YES; }
}

9) I've implemented - (void) bannerView:(AdBannerView *)banner didFailToReceiveAdWithError:(NSError *)error like this:

-(void)bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError *)error
{
NSLog(@"Failed Loading iAd");
if (self.bannerIsVisible) {
    [UIView beginAnimations:@"animateAdBannerOff" context:NULL]; banner.frame = CGRectOffset(banner.frame, 0, -banner.frame.size.height);
    [UIView commitAnimations]; self.bannerIsVisible = NO; }
}

When I run this on the simulator or my device the output is:

2013-08-29 21:29:27.643 iAdPracticeApp[1098:c07] Failed Loading iAd
2013-08-29 21:29:57.773 iAdPracticeApp[1098:c07] Failed Loading iAd
2013-08-29 21:30:58.152 iAdPracticeApp[1098:c07] Failed Loading iAd
2013-08-29 21:32:58.542 iAdPracticeApp[1098:c07] Failed Loading iAd
2013-08-29 21:36:58.919 iAdPracticeApp[1098:c07] Failed Loading iAd
2013-08-29 21:40:59.473 iAdPracticeApp[1098:c07] Failed Loading iAd
2013-08-29 21:45:00.997 iAdPracticeApp[1098:c07] Failed Loading iAd

I understand that Apple simulates loaded ads and failed to load ads. I also realize that I can go into my developer setting of my iOS device and change the error rate to happen 0%, 50%, 80%, 100%. No matter what I try I can't get an iAd to properly load. What am I doing wrong?