can't play shoutcast ip with port with backgroundAudio on Windows Phone 8

I'm new in developing Windows Phone app, so sorry if I do some silly mistakes.
I can't play shoutcast on WP 8, I already tried what suggested on someone else thread, but it doesn't help.

Here's part of my code: (though it could play no shoutcast one)

 private static List<AudioTrack> _playList = new List<AudioTrack>
    {
        new AudioTrack(new Uri("http://198.50.156.4:8062/;",UriKind.RelativeOrAbsolute), "Radio Vision", null, null, null, null , EnabledPlayerControls.All),
        new AudioTrack(new Uri("http://live.radiocosmobandung.com.:8001/cosmo", UriKind.RelativeOrAbsolute), "Ardan Cosmo", null, null, null, null , EnabledPlayerControls.All),
    };