Track wont download from cloud?

I just created a cloud sync.

The most part works and i can se the synced tracks in my ipad. But i cannot download the tracks from the cloud to the ipad so that i can play the track in rekordbox on my ipad! 

I go to Collection. Press the three dots..marks the track and press the icon for download from cloud.. The track got unmarked.. a timer icon is shown right to the track.. but it wont start download... what can be the problem?