Google Adsense issue

Hello,

I'm using plugin name "Adsense Explosion" http://wordpress.org/plugins/adsense-explosion/ to display Google Adsense at all of my site.

This site http://www.nhadep.net display fine.

But not this site http://www.hivietnam.net/vi

I have configed to put the ad at middle/bottom/sidebar of the post but it not works. Please help me take a look.

Thanks,
Tuan.

p/s: i have granted access for you in case you want to login my admin page.