Servlet e java ME

package acessaServlet;

import java.io.IOException;
import java.io.InputStream;
import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.TextBox;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;

public class LoginMidlet extends MIDlet implements CommandListener, Runnable {
    private Display display;
    private Form tlogin;
    private TextField nome;
    private TextField senha;
    private TextBox tlogado;
    private Alert alertalogin;
    private Alert alertaerro;
    private Command cancelar;
    private Command login;
    private Thread t = null;
    
    String URL_servidor = "http://localhost:8080/servidor/login.do";
    
    public LoginMidlet() {
        tlogin = new Form("Login do Aplicativo");
        tlogado = new TextBox("Usuario Validado","", 20, TextField.ANY);
        cancelar = new Command("Cancelar", Command.EXIT, 0);
        login = new Command("OK", Command.OK, 1);
        alertaerro = new Alert("Login Incorreto", "Tente Novamente", null, AlertType.ERROR);
        nome = new TextField ("Nome:", "", 20, TextField.ANY);
        senha = new TextField ("Senha:", "", 10, TextField.PASSWORD);
    }
    
    public void startApp() {
        display = Display.getDisplay(this);
        tlogin.append(nome);
        tlogin.append(senha);
        tlogin.addCommand(cancelar);
        tlogin.addCommand(login);
        tlogin.setCommandListener(this);
        display.setCurrent(tlogin);
        tlogado.addCommand(cancelar);
    }
    
    public void pauseApp() {
    }
    
    public void destroyApp(boolean unconditional) {
        notifyDestroyed();
    }
    
    public void tenteNovamente() {
        alertaerro.setTimeout(Alert.FOREVER);
        nome.setString("");
        senha.setString("");
        display.setCurrent(alertaerro, tlogin);
    }
    
    public void chamaServlet() throws IOException {
        String URL_enviada = URL_servidor+"?nome="+nome.getString()+"&senha="+senha.getString();
        HttpConnection conexao = null;
            InputStream IS = null;
            try {
                  conexao = (HttpConnection)Connector.open(URL_enviada);
                  conexao.setRequestMethod(HttpConnection.GET);
                  conexao.setRequestProperty("IF-Modified-Since", "20 Jan 2001 16:19:14 GMT");
                  conexao.setRequestProperty("User-Agent","Profile/MIDP-1.0 Configuration/CLDC-1.0");
                  conexao.setRequestProperty("Content-Language", "en-CA");
                  IS = conexao.openInputStream();
                  int tamConteudo = (int)conexao.getLength();
                  byte[] dados = new byte[tamConteudo];
                  IS.read(dados);
                  String resposta = new String (dados, 0, tamConteudo);
                  if (resposta.startsWith("validado")) { //usuario cadastrado
                      alertalogin = new Alert ("Login","Usuário validado!",null, AlertType.CONFIRMATION);             
                      alertalogin.setTimeout(Alert.FOREVER);
                      tlogado.setString("Bem vindo(a)!");
                      tlogado.setCommandListener(this);
                      display.setCurrent(alertalogin,tlogado);    
                   } else { //usuario não encontrado
                       tenteNovamente();
                   }
            } finally {
                   if(IS!= null) {
                           IS.close();
                    }
                   if(conexao != null) {
                       conexao.close();
                   }
            }
        }     
    
    private void connectThread(){
           t = new Thread(this);
            t.start();
        }
    
    public void run(){
         try{chamaServlet();}catch (Exception e){}
        }

    public void commandAction(Command c, Displayable d) {
              if(c == cancelar) {
                destroyApp(true); // fecha a aplicação
              }else if(c==login) {
                  connectThread();
          }
        }
}

package controle;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class LoginServlet extends HttpServlet {

	private static final long serialVersionUID = 1L;

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws IOException, ServletException {

		response.setContentType("text/plain");
		PrintWriter out = response.getWriter();
		
		String nome = request.getParameter("nome");
		String senha = request.getParameter("senha");
		
		String mensagem = "";
		
		System.out.println("dentro doGet");//esta mensagem não esta sendo executada
		
		if (nome.equals("Maria") || senha.equals("123")) {
			mensagem = "validado";
		}
		out.println(mensagem);
	}
}