Mostly, trouble cause by OSX's permissions. Here is the steps to fix permissions relative to Screen log. First, you must be log in as administrator. (very important) Then Select Shared folder in Users folder in your start up disk. Choose "Get Info" from Finder's File menu.ns in red marked in left scrren dump and adjust to same as picture if not match. Finally, Click the "Apply to enclosed items" button. Launch KidsGoGoGo and start screen logging. If you have old movie log, delete it first and start over again. If you still remain the trouble, you need to delkete old movie file that give you the permissions trouble.