Error al crear HEADER de seguridad con JAXB

Saludos a todos,

Me topado con el siguiente error al querer agregar el header de seguridad en un web service desarrollado con sprinframework y JAXB:
javax.xml.soap.SOAPException: unable to find namespace for prefix: wsse
at weblogic.xml.saaj.SOAPElementImpl.addChildElement(SOAPElementImpl.java:357)
at pr.com.prt.eppaSapInt.ws.SecurityHeader.doWithMessage(SecurityHeader.java:48)

Esto es lo que mando como request:
[SaajUtils] SOAPElement [weblogic.xml.saaj.SOAPEnvelopeImpl] implements SAAJ 1.3
[SaajUtils] SOAPElement [weblogic.xml.saaj.SOAPBodyImpl] implements SAAJ 1.3
[sent] Sent request [DATOS EN GENERAL]
[received] Received response [AQUI COLOCA EL XML QUE MANDO]
[WebServiceTemplate] Received Fault message for request [SaajSoapMessage {http://americamovil.com/EPPA/PR/FHR/Empleados}MT_Empleados_req]
[SaajUtils] SOAPElement [weblogic.xml.saaj.SOAPFaultImpl] implements SAAJ 1.3

Este es el código donde creo el header:
public class SecurityHeader implements WebServiceMessageCallback{

@Override
public void doWithMessage(WebServiceMessage wsMessage) throws IOException, TransformerException {
SOAPMessage soapMessage = ((SaajSoapMessage)wsMessage).getSaajMessage();

SOAPHeader header;
SOAPHeaderElement security;
SOAPHeaderElement usertoken;
SOAPElement username;
SOAPElement password;

try {
header = soapMessage.getSOAPHeader();

security = header.addHeaderElement(new QName("http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd", "Security", "wsse"));
usertoken = header.addHeaderElement(new QName("http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd", "UsernameToken", "wsu"));

username = usertoken.addChildElement("Username", "wsse");
password = usertoken.addChildElement("Password", "wsse");
password.setAttribute("Type","http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#PasswordText");

username.setTextContent("eppa2SAP_app");
password.setTextContent("eppa2SAP_app123");

security.addChildElement(username);
security.addChildElement(password);
security.addChildElement(usertoken);

JAXBContext context = JAXBContext.newInstance();

Marshaller marshaller = context.createMarshaller();
marshaller.marshal(null, ((SoapHeader) soapMessage).getResult());

} catch (JAXBException e) {
throw new IOException("error while marshalling authentication JAXB.");
} catch (MarshallingException e) {
throw new IOException("error while marshalling authentication exception.");
} catch (SOAPException e1) {
e1.printStackTrace();
}

}