Problem with simultaneous collaboration in indesign beta with creative cloud

Dear Community 

My colleague and I wish to work silmultaneaously on an indesign document. We have both setup indesign beta and I have placed the file in the creative cloud and sent her collabotation link. But her access to the file comes up with a warning saying that she cannot access the file as I'm working on it. In this case we might as well work on our company server, as there is no option for simultanous collaboration. Any ideas to get the collaboration to work?