I'm following directions in the install.html document in the jbpm install directory that says how to install jbpm without the demo, "Manually installing the different components". When I got to the part about starting up task service (ant start.human.task), the task service doesn't execute in the background. Is the service hung, waiting for something, or is the service supposed to run in the foreground? If the latter, the instructions don't indicate that this will happen.