[Theme:hueman] Adsense not working on single post

Hello,

I had added the official google adsense plugin. Using its setting through control panel i have place my ads on main page and singles post etc. All of them appear but only one on single post doesn’t appear. Can any one help ?
Frustrating.

I add it every time and then it disappears after a few minutes. Creates a new ad everytime.

thanks
SN