Sync Itunes playlists with Rekordbox playlists problem.

I can't seem to work out how 'sync' between iTunes playlists and Rekordbox playlists is supposed to work.

I create playlists in iTunes that I want to sync with playlists in Rekordbox.

I then add those iTunes playlists  to Rekordboax in sync manager.

Now I can see those iTunes playlists on the left under iTunes in Rekordbox.

That's fine.

If any of those iTunes playlists are updated are they supposed to sync into Rekordbox?

I can't make it work.

Any help?

Cheers!