Ad requests never filled with AdMob

Question

Well, I get this message all the time using AdWhirl:

Unable to fill ad request. This is a common situation.

I think it's from the AdMob network. I also have a couple of other networks (registered yesterday) and I never seem to be getting any ad requests filled. In test mode it does work though. Now is this common and will it pick up?

Answer 1

Turns out it went away after a couple of days. I guess AbMob had to review the application first.