Hallo!
Just one note... when i go to http://pdradio.iem.at/radio and click on the stream, the download comes as radio.m3u.mp3 rather than just .m3u
this is interesting, you are on windows, right? because here on linux I get a .m3u, and I know something was wrong on windows, but I didn't find a solution how to fix it - maybe this helps, I will try ...
Thanks, LG Georg