Unfortunately we have no experience what so ever with the Frontier Silicon wifi radio. We can only recommend contacting the devices own support team for some assistance with this. http://www.frontier-silicon.com/contact-us
I have frontier silicon wifi radio 'PURE' AV-BT 1506.
streaming url other than. MP3, .rm or .wma does not work with this radio.
I added streaming url 'http://centauri.shoutca.st:8549/;' for station 'rmasalerno', unfortunately this url has m3u audio so it plays but no audio.
I would try to find url with. Mp3 audio if avilable.
Even though streaming url is with .mp3, it does not work on silicon or other radios as it is a restricted one i.e. if you look at shoutcast administration page, it shows 'require registration' & packet capture data shows 'cross listener - false', now trying to find whether shoutcast registration can be bypassed!