Link not working for XDJ XZ and XDJ 1000mks

Hi friends

Anyone encounter the same issue as me?
I had my xdj 1000mk2 connected to my xdj xz via lan cable on channel 3 port and my xdj xz connected to my windows 10 laptop, i was able to load rekordbox and the "LINK" button was there and i click on it, turning on buttons of XZ and 1000mk2 physical players to rekordbox mode  i was able to see 3 decks, BUT, i was only able to load tracks to 1 & 2, when i tried loading tracks to 3rd deck (1000mk2) via my laptop, i wasn't able to, and i went back to the 1000mk2 unit and browse for track and no tracks appear on screen, any kind soul able to teach me to help me figure this out?

Many thanks