Apple TV app not connecting on Virgin 360 box
I have been using Apple TV on my Virgin 360 with no problem until yesterday. Now when I select the Apple TV app, it shows the Apple TV logo then displays a box saying it's unable to connect to Apple TV and to check my internet connection. There are two buttons 'Try Again' or 'Exit App'. I know the box is connected to the internet as the Virgin features work as do other streaming services (Netflix, BBC iPlayer, Amazon Prime etc).
I have tried rebooting the Virgin Box but it makes no difference.
How can I fix this problem?