It's specifically blocking the yourmuze server.
Maybe this touches on something the owner of a different station complained of in this forum a few weeks back. Apparently YOURMUZE isn't just like any other internet listener. The poster complained of excessive "station check hits from Moodio user agent". Is this a complaint about the YOURMUZE server, or about the software your listeners are using? What are these hits, why are they necessary, and why do some stations find it such an impost that they need to ask YOURMUZE to remove them from your listing?
I just had another look at the MKW website. It is 5:45 am German time and the station is off the air. So possibly it does not broadcast 24/7?