Those don't work if it's not connected to a multiplayer server. That's one of the limitations of the program at this time, working on fixing that. They work just fine in a multiplayer server though.
                
             . Would be nice to make it working.
. Would be nice to make it working. , but I couldn't really try 1. It works, but no one else is on server...
, but I couldn't really try 1. It works, but no one else is on server... )
)