[Zope] authenticate and Zope 2.2.4

Is it possible that since 2.2.4 the authenticate-method is no longer allowed?? In an 2.2.0-installation a script to authenticate users it's working perfectly and in two other machines(win98 and Linux) with 2.2.4, Zope doesn't want the user(role as manager) to use it(a pop-up-authentication-window appears). Why??And if authenticate it's no longer allowed(the reasons?), which method can you use to check the correctness of a password?? Thanks Sven -- Sent through GMX FreeMail - http://www.gmx.net