MOXy @XmlPath ignored

Question

I have a very simple class with two fields, String sourceAddress and int port.
I want them to be mapped on the source/address and source/port nodes instead of the jaxb default sourceAddress and sourcePort.
So i use MOXy @XmlPath annotation.
The problem is that the annotation is just ignored and i get the "jaxb default" xml file:

<szk>
    <sourceAddress>test</sourceAddress>
    <sourcePort>10000</sourcePort>
</sz>

thanks in advance for any help Agostino

import javax.xml.bind.*;
import javax.xml.bind.annotation.*;
import org.eclipse.persistence.jaxb.JAXBContext;
import org.eclipse.persistence.oxm.annotations.XmlPath;

@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class SZK {

    @XmlPath("source/address")
    private String sourceAddress;
    @XmlPath("source/port")
    private int sourcePort;

    public static void main (String [] args) throws JAXBException{

        SZK k = new SZK();
        k.sourceAddress = "test";
        k.sourcePort = 10000;

        javax.xml.bind.JAXBContext jc = JAXBContext.newInstance(SZK.class);
        Marshaller m = jc.createMarshaller();
        m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
        m.marshal(k, System.out);

    }

}