Google Adwords keyword error #2

Traceback (most recent call last):
  File "./adstest.py", line 28, in <module>
    account_service.GetAccountInfo()
  File "/path/to/virtualenv/lib/python2.5/site-packages/adspygoogle/adwords/AccountService.py", line 64, in GetAccountInfo
    return self.__service.CallMethod(method_name, ())
  File "/path/to/virtualenv/lib/python2.5/site-packages/adspygoogle/adwords/AdWordsWebService.py", line 185, in CallMethod
    self._op_config['group'], self._op_config['version']])
KeyError: 'group'