I am having the same problem. Online chat advised me to open in browser and suggested Mozilla so I downloaded this to my ipad and logged in fine to my Now TV account. I was unable to watch anything though as it was not supported and instructed me to launch the app!! I did this and exact same problem logging in. Cannot recoginise the log in details when they are perfectly fine on all other devices. Spent 2 hours trying to sort this and still no further forward. I registered for Now TV for the ease and 'portability' which I do not have if the app cannot be used? Help!