From the end of February 2015, the BBC have turned off all WMA (Windows Media Audio) streams, so no radio stations will work in Listen Again.
Version 2.1 will show message saying “error: preAvailablity”, and I’ve just released an update which gives a clearer message when the app starts.
I’ve had a quick look at the AAC streams but they use HLS (HTTP Live Streaming) which is not natively supported on Windows Phone, so using them is not easy.
I do this app in my spare time, so don’t really have a huge amount of time available to fix this. If I find time, great. If not, well, thanks for playing along!