My CDJ 850's don't show up when connected in rekordbox

My cdj 850s don't show up when connected in rekordbox v 6? when using reckordbox v5 they worked fine.

All the drivers are up to date, when using reckordbox v5 once the CDJ's were conected to my computer on the CDJ screen it would pop up with a chose to slect what deck to choose however now when I conect them they dont come up with a option at all they simply say conected and in the program its self they arnt reckonised.