The original hsql-ds.xml worked. The problem with the DefaultDS is gone. I have two web projects MyPortal, containing my-object.xml and portlet-instances.xml and MyPortlet which contains portlet.xml and the MyPortlet.class in /WEB-INF/classes/org/jboss/portlet/hello/MyPortlet.class Both the portal-pages from my-object.xml and MyPortlet are listed in the management-portlet from the jboss default-portal only the instance is missing. If I create it via management-portlet everything works great but then I wouldn't need the portlet-instances.xml. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4054698#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...