I want to invoke a EJB as a web service. But it is giving me an error "No such operation : "authenticate".

I wrote the
web-services.xml for it as follows:-


<deployment
xmlns="http://xml.apache.org/axis/wsdd/"
targetNamespace="http://net.jboss.org/service1"
xmlns:service1="http://net.jboss.org/service1"
xmlns:java="http://xml.apache.org/axis/wsdd/providers/java">
<!-- Session bean exposed as a web service -->
















Client for it is as follows:-


import org.apache.axis.client.Call;
import org.apache.axis.client.Service;
import com.baypackets.sms.utility.CommonUserInfo;
import com.baypackets.sms.utility.DataObject;
import javax.xml.namespace.QName;
import java.util.Vector;

public class client {

public static void main(String[] args) {
try {
String endpoint =

"http://123.122.4.43:8003/jboss-net/services/Session1";
Service service = new Service();
org.apache.axis.client.Call call = (org.apache.axis.client.Call)

service.createCall();
call.setTargetEndpointAddress( new java.net.URL(endpoint) );
call.setOperationName("authenticate");

call.setReturnClass(x.class);


QName qn = new QName("http://123.122.4.43:8003/jboss-net/services/Session1","x");
call.registerTypeMapping(x.class, qn, new

org.apache.axis.encoding.ser.BeanSerializerFactory(x.class, qn), new

org.apache.axis.encoding.ser.BeanDeserializerFactory(x.class, qn));
x ret = (x) call.invoke( new Object[] {"dd","1234" } );
}
catch(Exception ex) {
System.out.println("Exception caught");
ex.printStackTrace();
}
return;
}
}

Can anyone tell me what the problem is?
thanx,
shubhu