We are sorry to hear this. There are a few potential factors that can be causing this error message and the restriction of using catch up and on demand features. Can you confirm a few things for me?
Which STB (set top box) do you currently have?
How is it connected? (Via WiFi or cable connection?)
What is the current connection status? (This can be hound on Home> Help&Settings> Settings> Network> View Network Status)
