You need to tell FamilyProperty who it is that you want to have access to the files. Now perhaps you want everyone in your firm to have access to every file, in which case use these instructions - Adding a user (familyproperty.com.au)
Perhaps you want only the people who are working on a particular matter to have access to individual matters, in which case use this - Adding a user to an individual matter (familyproperty.com.au)