Error while executing wsgen

parsing WSDL...
[WARNING] Ignoring SOAP port "DasImplPort": it uses non-standard SOAP 1.2 binding.

You must specify the "-extension" option to use this binding.
  line 1 of http://localhost:8080/jaxws-Das/InvokeDasService?wsdl

[WARNING] Service "DasImplService" does not contain any usable ports. try running wsimport with -extension switch.
  line 1 of http://localhost:8080/jaxws-Das/InvokeDasService?wsdl

generating code...

symbol  : class DasImplPort
location: class Das.client.DasClient
             DasImplPort port = new DasImplService().getDasImplPort();
                ^
C:\jaxws-ri\samples\Das\src\Das\client\DasClient.java:7: cannot find symbol
symbol  : class DasImplService
location: class Das.client.DasClient
             DasImplPort port = new DasImplService().getDasImplPort();

package Das.client;

import javax.xml.ws.BindingProvider;
public class DasClient {
    public static void main (String[] args) {

             DasImplPort port = new DasImplService().getDasImplPort();
             log((BindingProvider)port);

            String str="ContactService";

            System.out.printf ("Invoking Service",str);
            String result = port.InvokeDasService(str);
            System.out.printf ("The result of %s\n\n", result);


    }
    private static final void log(BindingProvider port) {
             if (Boolean.getBoolean("wsmonitor")) {
                 String address = (String)port.getRequestContext().get(BindingProvider.ENDPOINT_ADDRESS_PROPERTY);
                 address = address.replaceFirst("8080", "4040");
                 port.getRequestContext().put(BindingProvider.ENDPOINT_ADDRESS_PROPERTY, address);
             }
    }
}

[WARNING] Ignoring SOAP port "DasImplPort": it uses non-standard SOAP 1.2 binding.
 
You must specify the "-extension" option to use this binding.
  line 1 of http://localhost:8080/jaxws-Das/InvokeDasService?wsdl
 
[WARNING] Service "DasImplService" does not contain any usable ports. try running wsimport with -extension switch.
  line 1 of http://localhost:8080/jaxws-Das/InvokeDasService?wsdl
 
generating code...

symbol  : class DasImplPort
location: class Das.client.DasClient
             DasImpl port = new DasImplService().getDasImplPort();
                ^
C:\jaxws-ri\samples\Das\src\Das\client\DasClient.java:7: cannot find symbol
symbol  : class DasImplService
location: class Das.client.DasClient
             DasImplPort port = new DasImplService().getDasImplPort();

package Das.client;

import java.net.MalformedURLException;
import java.net.URL;
import javax.xml.namespace.QName;
import javax.xml.ws.Service;
import javax.xml.ws.WebEndpoint;
import javax.xml.ws.WebServiceClient;
import javax.xml.ws.WebServiceFeature;


/**
 * This class was generated by the JAXWS SI.
 * JAX-WS RI 2.1-02/02/2007 03:56 AM(vivekp)-FCS
 * Generated source version: 2.1
 * 
 */
@WebServiceClient(name = "DasImplService", targetNamespace = "http://server.Das/", wsdlLocation = "http://localhost:8080/jaxws-Das/InvokeDasService?wsdl")
public class DasImplService
    extends Service
{

    private final static URL DASIMPLSERVICE_WSDL_LOCATION;

    static {
        URL url = null;
        try {
            url = new URL("http://localhost:8080/jaxws-Das/InvokeDasService?wsdl");
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
        DASIMPLSERVICE_WSDL_LOCATION = url;
    }

    public DasImplService(URL wsdlLocation, QName serviceName) {
        super(wsdlLocation, serviceName);
    }

    public DasImplService() {
        super(DASIMPLSERVICE_WSDL_LOCATION, new QName("http://server.Das/", "DasImplService"));
    }

    /**
     * 
     * @return
     *     returns DasImpl
     */
    @WebEndpoint(name = "DasImplPort")
    public DasImpl getDasImplPort() {
        return (DasImpl)super.getPort(new QName("http://server.Das/", "DasImplPort"), DasImpl.class);
    }

    /**
     * 
     * @param features
     *     A list of {@link javax.xml.ws.WebServiceFeature} to configure on the proxy.  Supported features not in the <code>features</code> parameter will have their default values.
     * @return
     *     returns DasImpl
     */
    @WebEndpoint(name = "DasImplPort")
    public DasImpl getDasImplPort(WebServiceFeature... features) {
        return (DasImpl)super.getPort(new QName("http://server.Das/", "DasImplPort"), DasImpl.class, features);
    }

}

C:\jaxws-ri\samples\Das\src\Das\client>javac -cp C:\jaxws-ri\samples\Das\build\classes\Das\client;%CLASSPATH% DasClient.java

DasClient.java:10: cannot find symbol
symbol  : class DasImpl
location: class Das.client.DasClient
                DasImpl port = new DasImplService().getDasImplPort();
                ^
DasClient.java:10: cannot find symbol
symbol  : class DasImplService
location: class Das.client.DasClient
                DasImpl port = new DasImplService().getDasImplPort();
                                   ^
2 errors