u need xmms = 1:1.2.10 (version) to install the xmms-mp3-1.2.10-2.2.p.1.fc2.fr.i386.rpm
U probably have a older version of xmms which is incompatible with the rpm ur trying to install...
Uninstall the already installed xmms (old) rpm on ur machine..
Check what version of xmms u have
#rpm -qa | grep xmms
uninstall it by #rpm -ev name_of the_xmms_package
download the following RPM which is compatible with ur [xmms-mp3-1.2.10-2.2.p.1.fc2.fr.i386.rpm]
from
http://ftp.freshrpms.net/pub/freshrp...c2.fr.i386.rpm
Install it by #rpm -ivh xmms-1.2.10-2.2.p.1.fc2.fr.i386.rpm xmms-mp3-1.2.10-2.2.p.1.fc2.fr.i386.rpm
that should work