[Zope] problem(100) could this make LoginManager misbehave?

Hi, After alot trouble passed through to make LoginManager appeared in the products folder, yet i still experience this error when starting my zope server. Problem (100) init Ambigous name for method of Products.LoginManager.LoginMethods.BasicCookiesLogin: "manager_propertiesFor m" !="manager_main". I can see the LoginManager in the products folder my fear is that can this error cause the LM not to work well. regards. kamal.