You cannot play new WMA media (aka wma9) content on your 64bit Linux system because of missing audio format support, e.g you get an error message similar like that:
Cannot find codec for audio format 0x162.
/usr/lib/codecs
,e .g. with
tar xvjf essential-20071007.tar.bz2 mkdir -p /usr/lib/codecs mv essential-20071007/* /usr/lib/codecs/ ln -s /usr/lib/codecs /usr/lib/win32
echo "/usr/lib/win32/" > /etc/ld.so.conf.d/win32codecs.conf ldconfig
dpkg -i mplayer32_1.0svn_amd64.deb
/usr/bin/mplayer32 <URL>