Attivo.tv miniature in social share problem, wrong image appear on my wall

i have problem with Facebook share in my web site [login to view URL] i try to explain the issue, when i try to share an article like this one [login to view URL] with the Facebook share button i see in target page or target Facebook wall a wrong miniature image, but when i use the share button i see the correct share miniature. it appear an image from the right side one of the sponsor, not the post image. can u help me?