Looking at the image I see that you are trying to use your mobile browser, Xbox.com mainly uses Silverlight and some other platforms and seeing as you have a blackberry, they don't like those so they tend to redirect the user through another server. I would either go into the browsers settings and tick view as firefox, explorer and so on, something that is not local to the mobile platform. Another option would be to try another browser but I don't remember if blackberrys have them.

Its the exact same on a computer mate I'm using android just have the BBM app. It's ever since I signed up for the dashboard beta that introduced APPS and other stuff. But its the exact same message on everything I use PC/laptops really would like to know though :-/