yum error when try to get update from RHN

Hi all,

When I run yum update I get the errors as below in the end of this
email. I found a topic in RHN kbase FAQ, which told me to download and
install following packages
# rpm -Uvh yum-version.noarch.rpm
yum-metadata-parser-version.i386.rpmyum-updatesd-version.noarch.rpm
But I can NOT find them on RHN web and when I try "yum install
yum-metadata-parser" it says 
"Package yum-metadata-parser - 1.1.2-2.el5.x86_64 is already installed.
Nothing to do"

Anyone met and fixed this problem before?

Leo W

Yum update error
===========================================
Traceback (most recent call last):
  File "/usr/bin/yum", line 29, in ?
    yummain.main(sys.argv[1:])
  File "/usr/share/yum-cli/yummain.py", line 105, in main
    result, resultmsgs = base.doCommands()
...
...
  File "/usr/lib64/python2.4/site-packages/M2Crypto/httpslib.py", line
177, in _start_ssl
    self.sock.connect_ssl()
  File "/usr/lib64/python2.4/site-packages/M2Crypto/SSL/Connection.py",
line 149, in connect_ssl
    return m2.ssl_connect(self.ssl, self._timeout)
M2Crypto.SSL.SSLError: unexpected eof