Mojo's connection stuff isn't finished yet. With the current build, you if you make a change like that you need to shut down both Mojos and then start them both.

Did you do that?

Edit: For all problems of this type, please let me know if you shut down all Mojos and restarted all of them before you saw the problem. It makes a big difference to me.

The color codes aren't finished. The current scheme is temporary. Blue means two socket connections between the computers; purple means one socket connection (they are connected in one direction but not the other); black means no connection.