trying to help my sister sideloading Showbx app to her playbook. Finally was able to using ddb tool. The app was downloaded but as soon as I opened it this message apperars on the screen " The application Blackberry keyboard (process system.apps) has stopped unexpectedly. Please try again" and then it forces me to close it. can somebody help me? I am not an expert in computers and tech things, mostly google things and use the help of youtube