Rekordbox 5.22 and CDJ 2000 not working // USB is not detected

Hi there,

I just updated my Rekordbox to 5.22 and bought a new USB stick. Then I tranfered all the playlists from rekordbox to the new USB stick. Now when I'm plug in the stick to the CDJ 2000, the Player is unable to load the playlists. The lights on the usb stick and the usb Light on the player start to flash fast but nothing else happens. My other USB stick wich is exactly the same model works fine probably because I haven't used the latest Rekordbox version on it yet. I allready reformated then the Player detected it. So I guess it has to be the software.. Anyone experiencing the same problem? Any advice? I really need it to work!  

THX