Look at the streams the station has on the app, and see if they are in WMA. If so, thats the reason why. A whole group of stations here in Missouri, owned by the same company, would not play on my Evo 4G LTE, or my other iPhone, and I contacted the station and they said it was a problem with the TuneIn platform. They have since switched to MP3 and AAC streams, and they are perfectly fine now. So it has to do with the stations streaming in WMA.