Problems With Facebook Sharing

Hello everyone,

this is my first post and i don't know if this is the right Category. Anyway i'm facing trouble with the Sharing on Facebook.

First of All, here you are my web-site:

http://www.poterealleformiche.com

Where i installed the Atahualpa Theme. I have also installed the Sociable Plugin, to add at the end of every post the badges (Facebook,msn,myspace and so on) to share on various website. So, when i try to share on Facebook one of my posts, i always have the same issue. I Attached the image with the result.

Someone told me it was an host problem, but after i contacted my hosting they as well told me that was not their problem. Other ones told me that was a meta data problem of the post, so i installed a plugin that should create meta tags for all the posts on the wordpress. It still does not work.

I really can't find a solution to this problem, i hope someone can help.

Best Regards
Leonardo