Music stops in Radio Stations and Playlists

[Fuechsin0]

When I select a Radio Station (a Genre Station or a Station based on a Artist, Album, Song or Playlist) the Music stops afther a Number of Songs automatically (the same in a Playlist, when I've selected e.g. the first Song), by Radio Stations 20 Songs, by Playlists 100 Songs). When I then restart the Radio Station (with selecting aggain) or in a Playlist select the 101 Song, the same happens aggain (afther 20 Songs by Radio Stations and 100 Songs by Playlists). Please look to resolve the Problem. Another thing is, that the Songs in a Radio Station comes aggain and aggain and afther a Time the same Songs comes as a Cyrcle (this happens when you skip Songs (when you she not like or allready have hear)). Very Thanks and Sorry for my English (it is not so good).