Using AC3 filter, enable mpeg support, FFDShow Audio MP1\MP2 codec change to mp3lib or libavcodec depending on which version you have.
This also could be the fact that different audio streams are being transmitted and the graph does not rebuild on channel change (ie ac3 switching to mpeg1), going to Radio forces a graph rebuild (no video detected), at the moment this is how it works, but may need to be modified to take into account the audio changes.
Netherlands
