My daughters were watching Silver Linings Playbook when a message came on the screen and switched the channel. They are unable to switch back to the Shaw on Demand that they were watching. No idea what to try doing. I am not a big tv watcher so have no idea how to use all the remotes for the tv/cable box and Bose system. I have tried shutting cable box off and turning it back on, that doesn't work., it doesn't allow me to shut it off. They are missing the movie and I need to know how to get it back for them.