Radio streams do not play. Mp3 playback works. Please help.

I have just installed Volumio 1.55 on the original Raspberry Pi. I can play music from my NAS but none of the radio streams are working. GUI shows the station playing but I get no sound from the speakers. I have followed one of the tutorials to update mpd to the 0.19.9 version but that did not help. I am Windows guy so I only have a basic knowledge of Linux. Please help.