iPhone iAd: "no qualified ads found for this request"

I have a problem with iAd. I have two apps: l开发者_C百科et's call them AAA and BBB. AAA is a new application which is "Waiting for upload" with iAd enabled. BBB is an existing application which I want to update and is "Waiting for upload" too, with iAd enabled.

iAd in AAA works just fine. In BBB it shows this error in the console: Error Domain=ADErrorDomain Code=0 "no qualified ads found for this request"

The same iAd code is used in both apps. Only the provisioning profiles and the bundle identifiers change. Plus, if I change the bundle identifier of AAA with the one of BBB, it doesn't work! So it seems something related only to the bundle identifier. Apple's problem?

What should I do? I can't get it to work. I can't change the bundle identifier cause I would not be able to update my existing BBB app.

For what it's worth: I have similar issues with my FlashLight4 FREE app. Sometimes iads load just fine and typically once iAds started load fine I continue to see inventory filled for quite a while (5min).

Later then restart my app and I have zero fill-rate - see the same error as described in above entry. Once that happens typically I seem never to get any iAds filled; I have to stop-restart my app several times and then if I get lucky fill-rate goes up.

So I guess this is due to general low fill-rate in iAds.. but who knows.. AAPL is not exactly helpful in telling much..