My WSDL is generated by the ANT task provided by JBossWS. The schema definition looks as follows: <?xml version="1.0" encoding="UTF-8"?> | <definitions name='KundenverwaltungService' targetNamespace='http://de.hska.ws/jaws' xmlns='http://schemas.xmlsoap.org/wsdl/' xmlns:soap='http://schemas.xmlsoap.org/wsdl/soap/' xmlns:tns='http://de.hska.ws/jaws' xmlns:xsd='http://www.w3.org/2001/XMLSchema'> | <types> | <schema targetNamespace='http://de.hska.ws/jaws' xmlns='http://www.w3.org/2001/XMLSchema' xmlns:soap11-enc='http://schemas.xmlsoap.org/soap/encoding/' xmlns:tns='http://de.hska.ws/jaws' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'> | <complexType name='KundeData'> | <sequence> | <element name='art' nillable='true' type='string'/> | <element name='id' type='long'/> | <element name='nachname' nillable='true' type='string'/> | <element name='rabatt' type='int'/> | <element name='vorname' nillable='true' type='string'/> | </sequence> | </complexType> | ... The server doesn't throw any exception, and log shows these entries: 2006-07-28 06:34:05,116 DEBUG org.jboss.ws.soap.SOAPContentElement - setObjectValue: {id=1, nachname=Alpha, vorname=Adrian, art=privat, rabatt=0} | 2006-07-28 06:34:05,116 DEBUG org.jboss.ws.soap.SOAPContentElement - getXMLFragment from Object [xmlType={http://de.hska.ws/jaws}KundeData,javaType=class de.hska.ws.KundeData] | 2006-07-28 06:34:05,116 DEBUG org.jboss.ws.soap.SOAPContentElement - xmlFragment: <result xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><ns... xmlns:ns_art="http://de.hska.ws/jaws">privat</ns_art:art><ns_id:id xmlns:ns_id="http://de.hska.ws/jaws">1</ns_id:id><ns_nachname:nachname xmlns:ns_nachname="http://de.hska.ws/jaws">Alpha</ns_nachname:nachname><ns_rabatt:rabatt xmlns:ns_rabatt="http://de.hska.ws/jaws">0</ns_rabatt:rabatt><ns_vorname:vorname xmlns:ns_vorname="http://de.hska.ws/jaws">Adrian</ns_vorname:vorname></result> View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3961469#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...