Why my cousin can't see my tree?

I created my family tree, added relatives, and invited them to my tree. One of the cousins who accepted my request to join my tree can only see his immediate family, but not the entire tree. My cousin does not have another independent tree, and the only connection to Geni he has is the one that I added. 

Is there anything I can do with the set-up to allow my cousin to see the tree?

Thanks!