[Zope] Handling of objects returned from external methods within zope?

[Stephan Herschel]

Hi,

I'm using Zope 2.5.0 on Linux.

I have created an external method in Zope which catalogs and external 
function. This function just creates on object of a class defined in the 
external file and returns this.

The class looks like this:

class x:
	def y (s):
		return 1

Within Zope I now try to call the method y() of the object that is 
returned by the external function. This does not work - zope want's me 
to (re)login immediately.

I guess I'm just not allowed to use classes defined outside of zope 
within zope. Is there some way to register a class so that it's objects 
can be used inside of Zope? If so, how can I achieve this?

Thanks,
Stephan