Not recognizin widget area..

I have a site:
http://coursera-answers.com/

the problem is that this plugin not recognizing widget are, I had to add the banner manually to the widget.

Plus, it does not recognising other areas I would like to add the adsence…
For example – Under the first post in blog (homepage/archive/categiry)
How can I do this?

https://wordpress.org/plugins/google-publisher/