FEZ HYDRA and Seeed relays module issue

I’m using the FEZ Hydra with 2 Seeeds relay modules. When I connect one of the relays to socket 14, the Hydra doesn’t work properly anymore. It doesn’t bootup and doesn’t start his program anymore. What can be the issue to resolve this? We have a project where we sometimes need to add 4-6 of these relays and we’ll need that 14th socket.

Nobody has this issue???