iAds working in simulator and debug , but not in app store download

#import <UIKit/UIKit.h>
#import <iAd/iAd.h>

@interface DV : UIViewController {
	
	IBOutlet UITextView *desLabel;
	IBOutlet UILabel *titleLabel;
	ADBannerView *adBannerView;
}

@property (nonatomic, retain) IBOutlet UITextView *desLabel;
@property (nonatomic, retain) IBOutlet UILabel *titleLabel;
@property (nonatomic, retain) ADBannerView *adBannerView;

@end

- (void)viewDidLoad {
	[super viewDidLoad];
	adBannerView = [[ADBannerView alloc] initWithFrame:CGRectMake(0.0, 366.0, 320.0, 50.0)];
	adBannerView.requiredContentSizeIdentifiers = [NSSet setWithObject:ADBannerContentSizeIdentifier320x50];
	adBannerView.currentContentSizeIdentifier = ADBannerContentSizeIdentifier320x50;
	[adBannerView setHidden:YES];
	adBannerView.delegate = self;
	[self.view addSubview:adBannerView];
}

- (void)bannerViewDidLoadAd:(ADBannerView *)banner {
	[banner setHidden:NO];
}

- (void)bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError *)error {
	[banner setHidden:NO];
}

- (void)dealloc {
	[adBannerView release];
	[super dealloc];
}