Can't open m3u files

Hi there,
I am using OpenSuse 11.1 with KDE 4.2.2.
I’ve installed Amarok 2.1 beta. Opening Mp3 files is no problem at all. They are added instantly to the playlist.
But if I am trying to open a m3u file (containing a list of mp3 files) Amarok won’t open this file. It works if I open the m3u file within Amarok.
The file association looks similar for mp3 and m3u (amarok %U)
What can I do that Amarok is also adding m3u files to my playlist?
I appreciate any comment on this,