[Zope] how to clone an instance of a class into another location?

[Andy Pahne]

I tried to add a method (cloneInstance) to my class (myClass) that clones
the instance (myInstance) into another folder. I called the method with the
link  host/path/to/myInstance/cloneInstance.

The methods code:
  <dtml-call "manage_clone(this(),'clone',REQUEST)">

Which gave me the errormessage:

The object copy_of_998-X does not support this operation ?

Oh, really, doesn't it?

So, how can I achieve what I need? And how do I clone an object into another
location?

Andy