Problème bizarre JApplet (jre 1.5.06)

Salut à tous!

Je suis en train de développer une tite interface graphique avec un JApplet. Le problème, c'est que quand je teste, j'ai une erreur qui apparait dans ma console:

Java Plug-in 1.5.0_06
Utilisation de la version JRE 1.5.0_06 Java HotSpot(TM) Client VM
Répertoire d'accueil de l'utilisateur = C:\...
java.net.UnknownHostException: www
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at sun.net.NetworkClient.doConnect(Unknown Source)
    at sun.net.www.http.HttpClient.openServer(Unknown Source)
    at sun.net.www.http.HttpClient.openServer(Unknown Source)
    at sun.net.www.http.HttpClient.<init>(Unknown Source)
    at sun.net.www.http.HttpClient.New(Unknown Source)
    at sun.net.www.http.HttpClient.New(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at com.sun.deploy.net.proxy.AbstractAutoProxyHandler.getJSFileFromURL(Unknown Source)
    at com.sun.deploy.net.proxy.AbstractAutoProxyHandler.init(Unknown Source)
    at com.sun.deploy.net.proxy.DynamicProxyManager.reset(Unknown Source)
    at com.sun.deploy.net.proxy.DeployProxySelector.reset(Unknown Source)
    at sun.plugin.AppletViewer.initEnvironment(Unknown Source)
    at sun.plugin.AppletViewer.initEnvironment(Unknown Source)

je ne comprend pas du tout d'où ça peut provenir!!!
Pour info, la maquette de mon code: (qui peu peut être aider certains)

import java.awt.*;
import javax.swing.*;
import java.net.URL;
import java.net.MalformedURLException;
import java.awt.event.*;

public class HelloWorldApplet extends JApplet
{
    private Swing02 internalFrame,internalFrame2,internalFrame3;
    private FicheDescriptive fiche;
    private FenetreConteneur desktopPane;
    private Carte carte;

    public void init()
    {
       
      int x = this.getWidth();
      int y = this.getHeight();
       
      carte = new Carte();
      carte.setSize(x,y);
     
      desktopPane = new FenetreConteneur();
     
      desktopPane.add(carte);
     
      internalFrame = new Swing02("Légende",carte);
      internalFrame2 = new Swing02("Outils de navigation",carte);
      internalFrame3 = new Swing02("Données",carte);
     
      this.setVisible(true);
     
      internalFrame2.setSize(new Dimension(x*30/100,y*10/100));
      internalFrame2.setPreferredSize(new Dimension(x*30/100,y*10/100));
      internalFrame2.setLocation(x*70/100,0);
     
      internalFrame.setSize(new Dimension(x*30/100,y*45/100));
      internalFrame.setPreferredSize(new Dimension(x*30/100,y*45/100));
      internalFrame.setLocation(x*70/100,y*10/100);
      internalFrame.c.add(new JTree(), BorderLayout.NORTH);

     
      internalFrame3.setSize(new Dimension(x*30/100,y*35/100));
      internalFrame3.setPreferredSize(new Dimension(x*30/100,y*35/100));
      internalFrame3.setLocation(x*70/100,y*55/100);
      fiche = new FicheDescriptive();
      internalFrame3.add(fiche);
     
      desktopPane.add(internalFrame3);
      desktopPane.add(internalFrame2);
      desktopPane.add(internalFrame);
      desktopPane.setBounds(0,0,x,y);
     
      this.getContentPane().add(desktopPane);

      desktopPane.setComponentZOrder(carte,1);
      desktopPane.setComponentZOrder(internalFrame,2);
      desktopPane.setComponentZOrder(internalFrame2,2);
      desktopPane.setComponentZOrder(internalFrame3,2);

      super.repaint();
      desktopPane.repaint();
      desktopPane.setLayer(carte,JLayeredPane.DEFAULT_LAYER + 1);
      desktopPane.setLayer(internalFrame,JLayeredPane.DEFAULT_LAYER + 2);
      desktopPane.setLayer(internalFrame2,JLayeredPane.DEFAULT_LAYER + 2);
      desktopPane.setLayer(internalFrame3,JLayeredPane.DEFAULT_LAYER + 2);
    }
   
    public HelloWorldApplet(){
        this.init();
    }
}

/**
 *
 * @author Mr Veron
 */
import javax.swing.*; 
import java.awt.event.*;  
import java.awt.*;

 public class Swing02 extends JInternalFrame
  implements ActionListener{
    
   private String titre;
   private Carte carte;
   public Container c = getContentPane();
   private JButton bouton1;
  
 public Swing02(String nom, Carte c)
 {
   this.setTitle(nom);
   this.carte = c;
   this.setIconifiable(true);
   this.setResizable(true);
   this.setVisible(true);
   this.setAutoscrolls(false);
   bouton1 = new JButton("BLEU");
   bouton1.addActionListener(this);
   this.add(bouton1);
 }
 
 public void paint(){
    
 }
 
  public void actionPerformed(ActionEvent e){
        if (e.getSource() == bouton1)
        {
            if(carte.getBackground() != Color.BLUE)carte.setBackground(Color.BLUE);
        }
    }
 }

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

/**
 *
 * @author Mr Veron Aurélien
 */
public class FicheDescriptive extends JScrollPane
{
   class Formulaire extends JPanel
   {
       Formulaire(){
        JTextField text = new JTextField("C'est le grand méchant loup");
        JLabel label = new JLabel("essai");
        JTextField text1 = new JTextField("C'est le grand méchant loup");
        JLabel label1 = new JLabel("essai");
        JTextField text2 = new JTextField("C'est le grand méchant loup");
        JLabel label2 = new JLabel("essai");
        this.add(label2);
        this.add(text2);
        this.add(label1);
        this.add(text1);
        this.add(label);
        this.add(text);

        this.setAutoscrolls(false);
        this.setVisible(true);
       }
   }
   
    /** Creates a new instance of FicheDescriptive */
    public FicheDescriptive() {
        Formulaire formulaire = new Formulaire();
        this.setViewportView(formulaire);
        this.setBorder(
            BorderFactory.createTitledBorder(
             BorderFactory.createEtchedBorder() ,
             "Fiche descriptive" ) );
         this.setVisible(true);
    }
   
}

import java.awt.*;
import javax.swing.*;
/**
 *
 * @author Mr Veron
 */
public class FenetreConteneur extends JDesktopPane
    {
   
        public FenetreConteneur()
        {
            this.setVisible(true);     
        }
       
    }

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
/**
 *
 * @author Mr Veron
 */
public class Carte extends JPanel
    implements ActionListener {
   
    private JButton bouton;
           
    /** Creates a new instance of Carte */
    public Carte() {
      this.setBackground(Color.green);
      JLabel label = new JLabel("Coucou c'est moi");
      bouton = new JButton("Autre Couleur!");
      this.add(label);
      this.add(bouton);
      bouton.addActionListener(this);
      this.setVisible(true);
      this.setEnabled(false);
    }
   
    public void actionPerformed(ActionEvent e){
        if (e.getSource() == bouton)
        {
            if(this.getBackground() == Color.green)this.setBackground(Color.RED);
            else this.setBackground(Color.GREEN);
        }
    }
}


PPLLLLEEEEAAAAASSEEEE HELP!