Sidebar doesn't appear

Hi everyone, i need your help, please.
I´m working in pages with different templates. I need to use “Content sidebar“, what it means the content is in left side, and sidebar at the right side. I am OK?

So, when I put the content in the widget area, specifically in Right Sidebar (sidebar-right.php), nothing happens. Is like the widget area doesn´t work.

What can I do?. I really need to use the right sidebar in my pages.

Thanks a lot if someone helps me.