running: ant -Dchap=chap12 -Dex=2 run-example with jboss4.0.1sp1 gives this error:
[java] Contacting webservice at ....
[java] hello.hello(JBoss user)
[java] [ERROR,PortProxy] Port error
[java] java.lang.NullPointerException
[java] at java.util.Hashtable.put(Hashtable.java:396)
[java] at
com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.setProp
ty(SAXParserImpl.java:395)