JSTLExamples NetBean Sample Project

I’m trying to run explore SQL Tags section of the sample project provided by NetBeans called JSTLExamples
I changed the database url to use sample rather than the default jstl-sample because that is the databes in the Services pane under Databases. The schema is APP and the user is app.
I used app and app for user and password.
I am getting an SQLException when executing the QueryIterate option (first on the page).
The description of the exception is “No suitable driver found for jdbc:derby://localhost:1527/sample;create=true
I have tried adding the jar file derbyclient.jar to the project library, but this doesn’t correct the error.
I would have thought the project shouldn’t need tweaking like this anyway if it’s a sample project provided by Netbeans.
Any ideas, anybody?