pedrog, I am very grateful to you
code works in my blog 

I was the publisher
I have a blog on blogspot
blogspot subdomains will be different because each state visitors
example:
The main blog with the url "my-site.blogspot.com"
visitors from italy it will be "my-site.blogspot.it"
visitors from Singapore it will be "my-site.blogspot.sg"

Can I become a publisher in a-ads.com ?

Check your PM