help...

we get the following error message when we try to login to our control panel for ensim....can you help

key
Traceback (innermost last):
File C:\Program Files\Zope\lib\ python\ZPublish er\Publish.py, line 162, in publish
File C:\Program Files\Zope\lib\ python\ZPublish er\BaseRequest. py, line 427, in traverse
File .\base\AccessCo ntrol\CommonAcc essControl.py, line 235, in validate
(Object: RoleManager)
File .\base\AccessCo ntrol\CommonAcc essControl.py, line 296, in _authenticate
(Object: RoleManager)
File .\published\web host\WebHostAcc essControl.py, line 78, in userAuthenticat e
(Object: RoleManager)
File .\base\serverma n\current\regis trymgr.py, line 54, in value2dict
NameError: key