Hello. I bought 8 Deco X60 ax 3000 since I have a very big home. I bought them because I thought all of them could connect to each other, but it seems I was mistaken. All of my decos connect to the main unit and not any of the subunits. Is there a way to do this? 

Btw I dont know why it says model ap300, there was no x60 choise in the drop down menu.

Thanks