yum install mplayer??

myem007

请各位高手帮忙,为什么我用yum install mplayer 这个命令时会出现下面情况？我用的是FC7系统。谢谢
[root@localhost Desktop]# yum clean all
Cleaning up Everything
[root@localhost Desktop]# yum -y install mplayer
fedora                    100% |=========================| 2.1 kB    00:00     
primary.sqlite.bz2        100% |=========================| 3.8 MB    00:23     
freshrpms                 100% |=========================| 2.1 kB    00:00     
primary.sqlite.bz2        100% |=========================| 109 kB    00:04     
http://ftp-stud.fht-esslingen.de ... epodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found
Trying other mirror.
http://wftp.tu-chemnitz.de/pub/l ... epodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found
Trying other mirror.
http://rpm.livna.org/repo/7/i386/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found
Trying other mirror.
ftp://mirrors.tummy.com/pub/rpm. ... epodata/repomd.xml: [Errno 4] IOError: [Errno ftp error] 550 Failed to change directory.
Trying other mirror.
Error: Cannot retrieve repository metadata (repomd.xml) for repository: livna. Please verify its path and try again
[root@localhost Desktop]#     
                                                      不知道怎么做，请大家帮帮忙！