REST spring 3.1 returns HTTP Status 406 XML marshalling

Hello,

I've a controller that return a object. Convert to XML with the Xstream marshaller.
I tryed also with headers = { "Accept=application/xml, text/xml" }, but it always give me the following error in the browser:

URL in browser:
http://localhost:8080/qConfig/spring/rest/project/1

give following error. I have no idea what the problem is. Any idea?

HTTP Status 406
The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers.




applicationcontext.xml

Code:

---

    <bean id="xstreamMarshaller" class="org.springframework.oxm.xstream.XStreamMarshaller"/>
    <bean id="marshallingHttpMessageConverter"
          class="org.springframework.http.converter.xml.MarshallingHttpMessageConverter">
        <property name="marshaller" ref="xstreamMarshaller"/>
        <property name="unmarshaller" ref="xstreamMarshaller"/>
    </bean>
    <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <property name="messageConverters">
            <util:list id="beanList">
                <ref bean="marshallingHttpMessageConverter"/>
            </util:list>
        </property>
    </bean>

---

ControllerCode

Code:

---

  @RequestMapping(value = "/rest/project/{id}", method = RequestMethod.GET)
  @ResponseBody
  public QProject findProject(@PathVariable(value = "id")
  Long id) {
   
    QProject qProject = this.projectRepository.findOne(id);
 
   
    return qProject;
  }

---