XDJ-XZ and DJS-1000 Link problems

I am using rekordbox on PC, linked to the XZ. I have a LAN cable for Player 3 to the DJS-1000 and the sampler is successfull linked as player 3.

But, the devices do not synch the BPM. Try to set the sampler to master does not change the decks on XZ and vice versa. Master & Synch buttons on the DJS seem to do nothing.

Is there some kind of diagnostics if the link works? 

Thanks, Andres