Lost Garageband Project. Please Help!

Hi guys,

I make music on my Ipad garageband and save the projects into the cloud. In my computer (MacBook Pro) I can see the projects saved in Mobile Documents.

Let's call the project hypothetically: SONG. In Movile Documents are always two files: SONG.band and SONG.png. One morning when I open garageband on the ipad, SONG was gone. When I go to see at Mobile Documents is only SONG.png file.

Please can you help me get my project back? Thank you very much!