AdMob house ads doesn't work

Hello friends,
I’m trying to run house ads on AdMob but I can’t see any impressions
day before yesterday I set up a campaign with impressions goal and when I didn’t see any impressions I set up another one with ecpm but I can’t see any impressions too.
What is the problem?
I followed all steps with no errors.
Here a screen shot of the two campaigns
Capture.jpg
Thank you in advance

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