Display issues

Hi,

At home, I have a DDJ RB controller linked to my Macbook with the Rekordbox licence. 

I also have a MacBook Pro which has the free version of Rekordbox and is used for putting tracks on USB so I can play in clubs on CDJ2000's

My MacBook/DDJ-RB and licence works fine.

However, My MacBobok Pro running the free version of Rekordbox has issues. When I use sync manager to transfer tracks to USB. When I use the USB on either CDJ2000's or XDJ-RX the display doesn't feature the sound waves 

Any ideas how to fix this issue please?