Marketpress/Prosite – Products not showing up

I have my marketpress-prosite up and running. I added a new member, they added new products and the thumbnails don’t show up. The text shows but no thumbnail.

I thought the products were supposed to show up on the main site too?

Do I need to set something or did I change something that should be set?

The new members are using twenty eleven theme. Is this the issue?