Originally I have three google ads on header, top and bottom. All work well, Now I change the header ads to a sponsor ads and add a 160*600 google ads on sidebar, The ads work well on pages, category (where I only all 160*600 ads shown). For each post top and bottom ads work well but sidebar ads does not work. I have tried to change the ads number in single post to 10 in your plugin. But still the sidebar ads does not work in single post. Please help me solve the problem.