[Zope3-Users] ZAlchemy demos (z3c.zalchemy) - Unknown directive: engine

[Stefan Krumbiegel (Galileo Press)]

I installed Zope3 
(http://www.zope.org/Products/Zope3/3.3.1/Zope-3.3.1.tgz) and 
z3c.zalchemy from the repository (http://svn.zope.org/z3c.zalchemy/trunk/).
I followed the steps in the README.txt to try the ZAlchemy demos...

An error occured while starting the Zope3 instance:

zope.configuration.xmlconfig.ZopeXMLConfigurationError: File 
"/web/zope3_instance_worldcookery/etc/site.zcml", line 7.2-7.55
     ZopeXMLConfigurationError: File 
"/web/zope3_instance_worldcookery/etc/package-includes/z3c.zalchemy.demo-configure.zcml", 
line 2.0-2.46
     ZopeXMLConfigurationError: File 
"/usr/local/lib/python2.4/site-packages/z3c.zalchemy-trunk-py2.4.egg/z3c/zalchemy/demo/demo_1/configure.zcml", 
line 8.2
     ConfigurationError: ('Unknown directive', 
u'http://namespaces.zalchemy.org/alchemy', u'engine')

What could it be?

Thanks and best regards
Stefan