When I log on to my Xbox it asks which profile I want to select.
I choose mine.
When I then choose any of the apps for instance 'Iplayer, 40d, netflix' etc. It logs me out and comes up with 'you must be signed in to Xbox live to use 40d'
I then can click 'sign in to Xbox live' or 'Exit'
I can then reselct my account to get into the app.
When I then exit the app I get error status:8b050008-00000000-00000000 come up and logs me out of my accout back in the Dashboard.