Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/pymsn/service/SOAPService.py", line 195, in _response_handler
    response = method.process_response(soap_response)
  File "/usr/lib/python2.5/site-packages/pymsn/service/description/Sharing/FindMembership.py", line 75, in process_response
    memberships = service.find("./ab:Memberships")
AttributeError: 'NoneType' object has no attribute 'find'