[Zope] External Methods question

hello, I have read the External Methods reference located at zope.org/Documentation/Reference/ExternalMethods, and I'm trying to get the small playhouse example working. However, after calling /rsb/addPlayHouse?id=myHouse (successfully) and attempting to access /rsb/myHouse/index_html, I get a "requested document does not exist" error. My code is exactly as in the ExternalMethods document. Any assistance would be greatly appreciated. thanks, Sean Bowman