Unable to share public database entities across apps in cloud trial version...

Unable to share public database entities across apps in cloud trial version...

  
Hi - I am unable to share public database entities between applications in the cloud trial. Does anyone know is this a limitation of the cloud trial? Or is there some additional steps involved?
Here is what I am doing. Create an entity in a regular web app. Set it public property to TRUE. Then I am creating a mobile app that I was to access the same database entity. I try to import a reference entity and I cannot find it in the tool that is provided.
I have tried several different ways - but without success.
Any ideas?