[GWT] StatusCodeException: Unable to find/load mapped servlet class

com.google.gwt.user.client.rpc.StatusCodeException:
Unable to find/load mapped servlet class 'br.com.sclink.server.PessoaServiceImpl'

<module>

      <!-- ... -->
      <!-- Server-side code.-->
      <servlet path="/service" class="br.com.sclink.server.PessoaServiceImpl"/>
      <!-- ... -->

</module>

package br.com.sclink.server;

import br.com.sclink.client.PessoaService;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;

public class PessoaServiceImpl extends RemoteServiceServlet implements PessoaService{

	public String getIdAndName(){
		return "teste";
	}

}

package br.com.sclink.client;

import com.google.gwt.user.client.rpc.RemoteService;
import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;

@RemoteServiceRelativePath("/service")
public interface PessoaService extends RemoteService{

	public String getIdAndName();

}

package br.com.sclink.client;

import com.google.gwt.user.client.rpc.AsyncCallback;

public interface PessoaServiceAsync{

	public void getIdAndName(AsyncCallback<String> callback);

}

package br.com.sclink.client;

import com.extjs.gxt.ui.client.event.*;
import com.extjs.gxt.ui.client.widget.*;
import com.extjs.gxt.ui.client.widget.button.*;
import com.extjs.gxt.ui.client.widget.layout.*;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.RootPanel;

public class App implements EntryPoint{
	
	private PessoaServiceAsync pessoaService;
	private AsyncCallback<String> callback1;

	public PessoaServiceAsync getPessoaSvc(){
	    if(pessoaService == null){
	    	pessoaService = (PessoaServiceAsync) GWT.create(PessoaService.class);
	    }
	    return pessoaService;
	}

	public void onModuleLoad(){

		final ContentPanel panel = new ContentPanel();
		panel.setCollapsible(false);
		panel.setFrame(true);
		panel.setHeading("Aplicação de teste");
		panel.setLayout(new FitLayout());
		panel.setSize("100%", "100%");

		LayoutContainer c = new LayoutContainer();
		c.setStyleAttribute("backgroundColor", "white");
		c.setBorders(true);
		c.setSize("100%", "100%");
		
		Button button = new Button("Ok", new SelectionListener<ButtonEvent>(){
			@Override
			public void componentSelected(ButtonEvent ce){
				getPessoaSvc().getIdAndName(callback1);
			}
		});

		c.add(button);		
		panel.add(c);
		
		RootPanel.get().add(panel);

		// Set up the callback object
		callback1 = new AsyncCallback<String>(){

			public void onFailure(Throwable caught){
				System.out.println("[x] "+caught.toString());
			}

			public void onSuccess(String result){
				System.out.println("Success!");
				MessageBox.alert("result", result, null);
			}

		};

	}

}