[Zope] External Method import problems

I've been playing with Zope for a few days, and while I totally love it, I've got a weird problem. When I try to use external methods, not all of the module imports are available. For example, if I have a file MyLib.py which includes a "from DateTime import *", when I set up an external method from Zope, the code fails because it doesn't see the classes that I imported from the DateTime module. I think I'm missing something incredibly obvious, can anyone point it out? Thanks a lot! -- "One World, One Web, One Program" - Microsoft Promotional Ad "Ein Volk, Ein Reich, Ein Fuhrer" - Adolf Hitler