Problems installin

I tried to run the command but I get an error.

Traceback (most recent call last):
File “./check_esxi_hardware.py”, line 608, in ?
pywbemversion = pkg_resources.get_distribution(“pywbem”).version
File “/usr/lib/python2.4/site-packages/pkg_resources.py”, line 229, in get_distribution
if isinstance(dist,Requirement): dist = get_provider(dist)
File “/usr/lib/python2.4/site-packages/pkg_resources.py”, line 115, in get_provider
return working_set.find(moduleOrReq) or require(str(moduleOrReq))[0]
File “/usr/lib/python2.4/site-packages/pkg_resources.py”, line 585, in require
needed = self.resolve(parse_requirements(requirements))
File “/usr/lib/python2.4/site-packages/pkg_resources.py”, line 483, in resolve
raise DistributionNotFound(req) # XXX put more info here
pkg_resources.DistributionNotFound: pywbem

I have the following version of pywbem on the system.
pywbem.noarch 0:0.7.0-3.el5

I tried reinstalling that package but no change.

Anyone have any ideas please?