Thank you for reaching out to us.
I can see in your screenshot that there is an Ad Unit Id associated with your campaign, however, could you double check if the Ad Unit Id you are loading is the one associated with the campaign you've created as instructed in
this guide? You can also provide to us the Ad Unit Id in question privately (using
Reply privately to author option) so we can test it on our end.
On the other hand, given that you were able to load ads using your live Ad Unit Id, this means that your code implementation of the Mobile Ads SDK is working correctly. Please note that your
house ad campaign is in competition against other CPM-based ad sources, including the AdMob Network so it's possible that on your end, the ads loaded are just all coming from AdMob Network. That said, if you have any further questions about serving ads from your House ad campaigns, then I suggest that you reach out to the
Product Support Team or raise this over to the
AdMob Help Forum as these are the appropriate channels for your concern. Additionally, you may refer to
this article for more relevant information.