[Zope] What's the difference about ZopeTime() and DateTime() ?

I can use ZopeTime() in Zope 2.5.1 linux version, but it will give me problem in Zope 2.5.1 win32 version. I try to use DateTime, but got error message eeither. Thanks Yan __________________________________ Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month! http://sbc.yahoo.com