[Zope] [Zope]login manager error

on zope startup I get this zope@phonix:/usr/local/dc/zope$ ------ 2000-08-01T13:39:45 ERROR(200) Zope Couldn't import Products.LoginManager Traceback (innermost last): File /usr/local/dc/zope/lib/python/OFS/Application.py, line 396, in import_products (Object: string) File /usr/local/dc/zope/lib/python/Products/LoginManager/__init__.py, line 1, in ? File /usr/local/dc/zope/lib/python/Products/LoginManager/LoginManager.py, line 9, in ? ImportError: cannot import name SheetProviderContainer help! Thanks Owen