Consumir WebService Oracle

Pessoal, eu tenho um webservice simples, que pode ter o WSDL acessado da seguinte forma:

http://scott:tiger@localhost:8080/orawsv/SCOTT/EMPCOUNT?wsdl. O WSDL é:

  <xsd:element name="EMPCOUNTOutput">
    <xsd:complexType>
        <xsd:sequence>
          <xsd:element name="RETURN" type="xsd:double"/>
        </xsd:sequence>
      </xsd:complexType>
  </xsd:element>

</xsd:schema>

Oracle Web Service

Para isso, criei o seguinte client java:

import java.net.Authenticator;
import java.net.PasswordAuthentication;
import com.oracle.xmlns.orawsv.scott.empcount.EMPCOUNTService;
import com.oracle.xmlns.orawsv.scott.empcount.EMPCOUNTPortType;
import com.oracle.xmlns.orawsv.scott.empcount.SNUMBEREMPCOUNTInput;
import com.oracle.xmlns.orawsv.scott.empcount.EMPCOUNTOutput;

class EMPCOUNT_XDB {

public class MyAuthenticator extends Authenticator {

private String user;
private String password;

public MyAuthenticator(String user,String password) {
  this.user = user;
  this.password = password;
}

@Override
protected PasswordAuthentication getPasswordAuthentication() {
    PasswordAuthentication auth = new PasswordAuthentication(user,password.toCharArray());
    return auth;
}

}

public void empcountXDB(){

try { // Call Web Service Operation


        EMPCOUNTService service = new EMPCOUNTService();
        EMPCOUNTPortType

        port = service.getEMPCOUNTPort();

        SNUMBEREMPCOUNTInput parameters = new SNUMBEREMPCOUNTInput();

        EMPCOUNTOutput result = port.empcount(parameters);

        MyAuthenticator myAuth = new MyAuthenticator("SCOTT","tiger");
        Authenticator.setDefault(myAuth);

        System.out.println("Result = "+result.toString());



} catch (Throwable e1) {e1.printStackTrace();}

}

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

  EMPCOUNT_XDB t = new EMPCOUNT_XDB();
  t.empcountXDB();
  System.out.println("Result = ABCDEFG");

}

}

Mas sempre acabo com o erro:

org.apache.axis2.AxisFault: Transport error: 401 Error: Unauthorized.

Algo errado com a minha autenticação. O que pode ser?

Obrigado