[Zope] ZopeBook - URL to SQL

The Zope book discusses calling a ZSQL Method via a URL, saying that a request for a URL like: http://localhost:8080/zsql_method/parameter/value "will return a result object", but what I get is the index_html document at the root, although I do get a rendered record with: http://localhost:8080/zsql_method/parameter/value/dtml_method Am I supposed to be getting something like I do with: <dtml-var expr="zsql_method(parameter=value)"> and why am I not getting it? Cheers, Chris