CentOs 5.7 - YUM wrong

Hi,

how I can repair my YUM ?

I run:

# yum --version|head -1
Traceback (most recent call last):
  File "/usr/bin/yum", line 4, in ?
    import yum
  File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 50, in ?
    import comps
  File "/usr/lib/python2.4/site-packages/yum/comps.py", line 23, in ?
    iterparse = cElementTree.iterparse
AttributeError: 'module' object has no attribute 'iterparse'

# yum update
Traceback (most recent call last):
  File "/usr/bin/yum", line 4, in ?
    import yum
  File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 50, in ?
    import comps
  File "/usr/lib/python2.4/site-packages/yum/comps.py", line 23, in ?
    iterparse = cElementTree.iterparse
AttributeError: 'module' object has no attribute 'iterparse'

#


Now, how I can repair my YUM?

I am in CentOs 5.7

Thanks