You will find a streaming BBC station in Amarok's Shoutcast streams list. See if it is the same station you want.
and you can also try to install codecs just in case if anything is missing, I always use this
link to install codecs and everything works afterwards (I read something about Mandriva 2008.1, it has a software preinstalled to fetch the required codecs so check that software too)
And Please provide us with a link of the radio stream you are trying to listen to.
That is all I can think of right now and I hope it helps.