Plug in All in one Adsense and YPN – not putting google ads on single post pages

I have been using the adsense plug in – all in one and ypn and it is great, on my main index page. I have a blog, but when you click on an individual post no google ads show up. I would like to see ads on these pages. I don’t have any restrictions checked off in the plug in such as don’t show ads on static pages etc. I have 3 ads chosen for number of ads per page, and 2 ads per post. Help!