Jetpack features not displayed

Hello Konstantin,

i discovered your great theme and I try to use it with one of my site. Everything worked fine at the beginning with simple features, but now I try to activate Jectpack and I don’t see any changes.
For example :
– I don’t see the “Likes”
– I can’t see neither the “Share buttons” because it’s impossible to drag and drop the buttons in the admin panel (and there is no “Facebook” button)
– I dont see similar articles
– when i add a “featured” tag to a post, it changes nothing (the image is the same size)
– …

I suppose I have forgotten something important… but what ? Is there something I must activate somewhere in the theme ?
Could you help me ?
Thanks a lot
a french Zorille