[Zope] Inheriting from ObjectManager

[Bocquillon Philippe]

Hello,

I am using Zope 2.3.3. 
In order my class ChannelFolder can contain other objects, I subclass it
from ObjectManager.
All works fine until I try to create other instances of the ChannelFolder
class IN a ChannelFolder instance (let's call the latter A).
In that case, these ChannelFolder objects are not created in A as expected
but in the container of A (so, one level too high).
I am using the following instructions:

     newChannelFolder=ChannelFolder(id, title, description)
     self._setObject(id, newChannelFolder)

to create and place the ChannelFolder objects in their container.

Any idea of what has to be done so it works properly ?

Thanks in advance,
 
Philippe Bocquillon