Does anyone know which system properties I need to set to use JAX-RPC in jboss 4.2.3. I don't want to use the jboss.ws stuff that comes with JBoss I want to use teh sun libs. I have the libs in the correct path but I am not sure of all the System properties I need to set to get this to work correclty. i.e. -Djavax.xml.soap.MessageFactory=com.sun.xml.messaging.saaj.soap.ver1_2.SOAPMessageFactory1_2Impl -Djavax.xml.soap.MetaFactory=com.sun.xml.messaging.saaj.soap.SAAJMetaFactoryImpl -Djavax.xml.soap.SOAPFactory=com.sun.xml.messaging.saaj.soap.ver1_2.SOAPFactory1_2Impl When I do this I get: java.lang.ClassCastException: com.sun.xml.messaging.saaj.soap.ver1_1.Envelope1_1Impl at org.jboss.ws.core.soap.SOAPEnvelopeImpl So it is still going into the jboss stuff instead of the jax-rpc stuff. Any ideas? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4258971#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...