al intentar instalar los codecs mp3 para el fc7, me da este error :

Loading "installonlyn" plugin
Setting up Install Process
Parsing package install arguments
http://rpm.livna.org/fedora/7/i386/repodata/repomd.xml: [Errno 12] Timeout:
Trying other mirror.
http://livna.cat.pdx.edu/fedora/7/i386/repodata/repomd.xml: [Errno 4] IOError:
Trying other mirror.
livna 100% |=========================| 2.1 kB 00:00
Could not retrieve mirrorlist http://mirrors.fedoraproject.org/mirrorlist?repo=fedora-7&arch=i386 error was
[Errno 4] IOError:
Error: Cannot open/read repomd.xml file for repository: fedora

por favor diganme por ke es
GRACIAS