[Yum] Can't use yum to update Fedora Core 5

[Tron Thomas]

I recently upgraded from Fedora Core 4 to Fedora Core 5 on my Intel 
Pentium IV system.  Now when I try to update using yum I get the 
following output:

Loading "installonlyn" plugin
Setting up Update Process
Setting up repositories
kde-redhat-stable-all                                                [1/6]
kde-redhat-stable-all     100% |=========================|  951 B    00:00
core                                                                 [2/6]
core                      100% |=========================| 1.1 kB    00:00
kde-redhat-stable                                                    [3/6]
kde-redhat-stable         100% |=========================|  951 B    00:00
livna                                                                [4/6]
http://rpm.livna.org/fedora/5/i386/RPMS.lvn/repodata/repomd.xml: [Errno 
14] HTTP Error 404: Date: Fri, 12 May 2006 04:36:32 GMT
Server: Apache/2.0.52 (CentOS)
Content-Length: 319
Content-Type: text/html; charset=iso-8859-1
Trying other mirror.
http://livna.cat.pdx.edu/fedora/5/i386/RPMS.lvn/repodata/repomd.xml: 
[Errno 14] HTTP Error 404: Content-Type: text/html
Content-Length: 345
Date: Fri, 12 May 2006 04:40:08 GMT
Server: lighttpd/1.4.11
Trying other mirror.
http://wftp.tu-chemnitz.de/pub/linux/livna/fedora/5/i386/RPMS.lvn/repodata/repomd.xml: 
[Errno 14] HTTP Error 404: Date: Fri, 12 May 2006 04:40:08 GMT
Server: Apache/2.0.52 (Red Hat)
Content-Length: 388
Content-Type: text/html; charset=iso-8859-1
Trying other mirror.
http://ftp-stud.fht-esslingen.de/pub/Mirrors/rpm.livna.org/fedora/5/i386/RPMS.lvn/repodata/repomd.xml: 
[Errno 14] HTTP Error 404: Date: Fri, 12 May 2006 04:40:09 GMT
Server: Apache/2.2.0 (Fedora)
Vary: accept-language,accept-charset
Accept-Ranges: bytes
Connection: close
Transfer-Encoding: chunked
Content-Type: text/html; charset=iso-8859-1
Content-Language: en
Trying other mirror.
Cannot open/read repomd.xml file for repository: livna
failure: repodata/repomd.xml from livna: [Errno 256] No more mirrors to try.
Error: failure: repodata/repomd.xml from livna: [Errno 256] No more 
mirrors to try.

How can I fix this problem so I can update successfully?