Rekordbox 6 vs Itunes

Hi,

Setup: Macbook pro with Rekordbox 6, collection/playlist by iTunes, Creative Plan, Cloudsync Copy mode. All tracks are imported in Rekordbox 6 with iTunes sync.

Now if installed Rekordbox 6 on my iMac at home, logged in with my Pioneer account. And it started downloading my files and playlist from the cloud. Now everthing is downloaded, but i cannot play the tracks, it saids there is a error loading the tracks. It happens with all my tracks. Can somebody please help out?

Thanks