JE,
Thanks for your reply.
Yeah I didn't even start the DemoTaskService, which normally happens with ant start.demo.
Instead I only did ant start.h2 and then ant start.jboss.
I had already deployed the WAR into the deployments folder of the JBoss AS7 instance.
Unfortunately, didn't work.
As soon as I turn on the DeomTaskService, with ant start.human.task, everything works fine with no errors.
So something more needs to be done beyond turning off the DemoTaskService.