[Yum] Yum 2.4 "no module named yum"

[JoeSnow]

no clue what to do >>

yum-2.4.0]# yum update
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:

   No module named yum

Please install a package which provides this module, or
verify that the module is installed correctly.

It's possible that the above module doesn't match the
current version of Python, which is:
2.4.1 (#1, May 16 2005, 15:19:29)
[GCC 4.0.0 20050512 (Red Hat 4.0.0-5)]

If you cannot solve this problem yourself, please send this
message to <yum at lists.linux.duke.edu>.