Problem image not showing on home but showing in post

Hello. Excuse my english, i'm french. I have a problem with catchbox theme ... I have a post including an image. When you read my post (http://www.emmanueljaime.com/?p=16) , you can see the image. But when your are on the homepage of the website (http://www.emmanueljaime.com/), you can't see the image in the preview of post !! And I have just seen that the image is not present when there is text on the article ... So : Image + text -> only text on homepage Image -> image on homepage Can someone help me please ? Thank you