[Zope] Can I use datetime and timedelta in zope?

Kaixo; I try to use datetime and timedelta in Zope and returns a error.... Error Type: ImportError Error Value: import of "datetime" is unauthorized I try use datetime and timedelta in an External Method and returns an error to .... Error Type: ImportError Error Value: No module named datetime There's any way to import this module in Zope or I must create a new product for it. Joseba. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com