ceilometer-agent-compute

Hello,
I have succeded to execute ceilometer-collector et ceilometer-agent-central
but for the ceilometer-agent-compute I had this error
Traceback (most recent call last):
  File "/usr/local/bin/ceilometer-agent-compute", line 5, in <module>
    pkg_resources.run_script('ceilometer==0', 'ceilometer-agent-compute')
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 499, in run_script
    self.require(requires)[0].run_script(script_name, ns)
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 1235, in run_script
    execfile(script_filename, namespace, namespace)
  File "/usr/local/lib/python2.7/dist-packages/ceilometer-0-py2.7.egg/EGG-INFO/scripts/ceilometer-agent-compute", line 37, in <module>
    prepare_service(sys.argv)
  File "/usr/local/lib/python2.7/dist-packages/ceilometer-0-py2.7.egg/ceilometer/service.py", line 61, in prepare_service
    cfg.CONF(argv[1:])
  File "/usr/local/lib/python2.7/dist-packages/ceilometer-0-py2.7.egg/ceilometer/openstack/common/cfg.py", line 1028, in __call__
    self._check_required_opts()
  File "/usr/local/lib/python2.7/dist-packages/ceilometer-0-py2.7.egg/ceilometer/openstack/common/cfg.py", line 1506, in _check_required_opts
    if opt.required:
AttributeError: 'IntOpt' object has no attribute 'required'

thanks