In jboss-5.0.0.Beta3-src\ejb3\docs\tutorial\webservice

org.jboss.tutorial.webservice.client.Client

Change

QName qname = new QName("http://bean.webservice.tutorial.jboss.org/jaws",
"CalculatorService");

to
QName qname = new QName("http://bean.webservice.tutorial.jboss.org/",
"CalculatorBeanService");