Dear Community, I have written a simple Web Service which uses Type Substitution (uses the @XmlSeeAlso annotation) Everything works fine if I use the classes, that are used by by the service, in the Client. But when I try to use the from WSDL generated classes in the Client, only the Super Classes are passed to the Web Service. So no Type Substitution at all. I have used the wsconsume -t 2.1 switch, so the @XmlSeeAlso annotations are present in the generated classes. I tried the same with GlassFish and there this proplem doesn't exist. I compared the generated classes and I found no differences with the annotations. Only some version comments were slightly different (JAX-WS RI 2.1.2 <-> JAX-WS RI 2.1.1) I'm using the JBoss 4.2.1GA release where I updated the JBossWS modul to version 2.0.0GA. Anybody here who has a clue on how to fix this problem? Thanks in advance. Greetings m_schumpa View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4073063#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...