LinuxQuestions.org - yum + Cannot open/read repomd.xml file for repository: update

Hi,

I have installed RHEL- 4 but i am having a problem with yum, it is giving me the following error -

Setting up Install Process
Setting up repositories
http://mirror.oss.oracle.com/Oracle/...ta/repomd.xml: [Errno 4] IOError: <urlopen error (-2, 'Name or service not known')>
Trying other mirror.
Cannot open/read repomd.xml file for repository: update
failure: repodata/repomd.xml from update: [Errno 256] No more mirrors to try.
Error: failure: repodata/repomd.xml from update: [Errno 256] No more mirrors to try.

The Base repository for it is as follows in the
/etc/yum.repos.d/ULN-Base.repo

[base]
name=Oracle-$releasever - Base
mirrorlist=http://mirrorlist.oss.oracle.com/?release=$releasever&arch=$basearch&repo=os
baseurl=http://mirror.oss.oracle.com/Oracle/$releasever/os/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://mirror.oss.oracle.com/Oracle/RPM-GPG-KEY-oracle

The internet connection on the machine is perfect, but when i try and open the link http://mirrorlist.oss.oracle.com/ in a browser it gives me

The requested URL could not be retrieved

Is there an other set of mirros that can be used for RHEL-4 for yum updates.

Thanks for the help in advance