Erro ao mandar dados para uma Servlet(JME)

import java.io.IOException;
import java.io.OutputStream;

import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
import javax.microedition.lcdui.Choice;
import javax.microedition.lcdui.ChoiceGroup;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.DateField;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.TextBox;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;


/**
 * @author fabio.pedrosa
 *
 */
public class PesquisaEleitoral extends MIDlet implements CommandListener {

	private Form form;
	private TextField renda;
	/**
	 * 
	 */
	public PesquisaEleitoral() {
		form = new Form("Pesquisa eleitoral");
		renda = new TextField("Qual sua renda mensal?","",10,TextField.NUMERIC);
		Command ok = new Command("Salvar", Command.OK, 1);
		form.addCommand(ok);
		form.setCommandListener(this);
	}

	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
	}

	protected void pauseApp() {
	}

	protected void startApp() throws MIDletStateChangeException {
		Display.getDisplay(this).setCurrent(form);

	}

	public void sendServlet() throws IOException{
		String url = "http://localhost:8080/xxx/servlet?acao=jme";
		HttpConnection http = (HttpConnection) Connector.open(url);
		OutputStream oStrm = http.openOutputStream();
		
		http.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
		http.setRequestMethod(HttpConnection.POST);

		byte data[] = ("&renda=" + renda.getString()).getBytes();
		oStrm.write(data);
		oStrm.flush();
		
	}
	
	
	public void commandAction(Command c, Displayable d){
		try {
			sendServlet();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}

Warning: To avoid potential deadlock, operations that may block, such as 
networking, should be performed in a different thread than the 
commandAction() handler.

if(acao.equals("jme")){
   System.out.println("chegou do celular");
   System.out.println("renda " + request.getParameter("renda"));
}