Maybe you are trying to play an mp3 file, if this is the problem Suse 10 comes with no support to mp3, divx, mpeg, etc (any copyrighted format).
So remove your libxine using yast (it will ask you to remove amarok and kaffeine too, just ignore the warning), go to Xine's website, download the new rpm (and the package libdvdcss to play dvd's too) and be happy!