[Zope] Rendering Folderish ZClass Object

Hi, I have a ZClass based on Folder. Contained within this is a DTML Method, index_html. This is mapped to the 'View' view and renders the appropriate object contained in itself depending on soem logic. All, is well if I access the object through a URL, the page is rendered as expected. However, if I access the object with the following code: <dtml-var testObject> All I get is: <MyClass instance at 8717b90> Why is this? Why does the normal rendering not take place? cheers, Chris PS: I notice that a normal folder object will behave identically, so the ZClass bti is probably irrelevent.