Yum Error

saya menghadapi masalah service yum di mana setiap kali saya cuba untuk mengemaskini applikasi dipelayan fedora core 4 sering saja ianya gagal. mesej yang dipap

Cannot open/read repomd.xml file for repository: base
failure: repodata/repomd.xml from base: [Errno 256] No more mirrors to try.

bagi menyelesaikan masalah yum repo ini saya telah mengemaskini baseurl file fedora-xtras.repo seperti dibawah:

[extras]
name=Fedora Extras $releasever - $basearch
#baseurl=http://download.fedora.redhat.com/pub/fedora/linux/extras/$releasever/$basearch/
baseurl=http://archives.fedoraproject.org/pub/archive/fedora/linux/extras/$releasever/$basearch/
mirrorlist=http://fedora.redhat.com/download/mirrors/fedora-extras-$releasever
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-extras
gpgcheck=1


file fedora-updates.repo juga saya turut kemaskini seperti dibawah:-

[updates-released]
name=Fedora Core $releasever - $basearch - Released Updates
#baseurl=http://download.fedora.redhat.com/pub/fedora/linux/core/updates/$releasever/$basearch/
baseurl=http://archives.fedoraproject.org/pub/archive/fedora/linux/core/updates/$releasever/$basearch/
mirrorlist=http://fedora.redhat.com/download/mirrors/updates-released-fc$releasever
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora