There must be something else going on. I'm running on JDK 1.6.0_18 and I have the exact same problem. I set both a breakpoint at ksession.startprocess line and at the next line (logger.close();). I never see any process instances in Eclipse and the console never shows the lines
Registered human task listener
[2011:01:31 19:01:46:debug] Message receieved on client : AddTaskResponse
[2011:01:31 19:01:46:debug] Arguments : [11]
Kinda mystifyng that so many people are having trouble getting the basic "helloWorld" example working....