[Zope] ldapuserfolder newbie problem: crypt not found

We just started with ldapuserfolder. During startup of the Zope server we got an error message: import error: no module named crypt And indeed, it is not there, so we forgot something, but what? Where is the crypt module coming from? Our Zope version: 2.5.0, Ldapuserfolder 2 Hans de Wit Stichting Farmaceutische Kengetallen Postbus 30460 2500 GL DEN HAAG Tel. 070-3737448 Fax 070-3737445