come posso risolvere questo problema? yum non mi funziona correttamente..

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

No module named rpm

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:
2.4.3 (#1, Jun 13 2006, 16:41:18)
[GCC 4.0.2 20051125 (Red Hat 4.0.2-8)]

If you cannot solve this problem yourself, please go to
the yum faq at:
http://wiki.linux.duke.edu/YumFaq

Grazie.