Productivity Tools Toolkit, problem with i18n

Hello
I try to use the add-on TPT (Productivity Tools Toolkit) with that i18n feature.
But it does not work, I can not find the problem.
Here's the code

/*
 * TptAppli.java
 *
 * Created on 17 mai 2012, 14:48
 */
package com.vaadin;

import com.autogenerer.categorie.CustomTableCategorie;
import com.autogenerer.controle.CustomTableControle;
import com.vaadin.terminal.ThemeResource;
import com.vaadin.ui.*;
import eu.livotov.tpt.TPTApplication;
import eu.livotov.tpt.gui.widgets.TPTMultiView;
import eu.livotov.tpt.i18n.TM;

/**
 *
 * @author Amallek
 * @version
 */
public class TptAppli extends TPTApplication {

    ThemeResource icone1 = new ThemeResource("../theme/controle-16.png");
    ThemeResource iconAdmin = new ThemeResource("../theme/configuration-16.png");
    ThemeResource iconAide = new ThemeResource("../theme/aide-16.png");
    ThemeResource iconSousAdmin = new ThemeResource("../theme/parametres-16.png");
    ThemeResource icon2 = new ThemeResource("../theme/gestionnaire-16.png");
    boolean isManageUrls = true;
    TPTMultiView controller = new TPTMultiView(isManageUrls);

    @Override
    public void applicationInit() {
        setTheme("theme");
        TM.getDictionary().setDefaultLanguage("en");
        Window mainWindow = new Window(TM.get("app.titre"));
        mainWindow.getContent().setHeight(null);
        mainWindow.getContent().setWidth(null);

        VerticalLayout vert = new VerticalLayout();
        MenuBar menu = new MenuBar();
        menu.setImmediate(true);
        MenuBar.MenuItem tableauBord = menu.addItem(TM.get("fonction1"), icone1, null);
        tableauBord.addItem(TM.get("sous.fonction1.1"), icon2, action1);
        MenuBar.MenuItem admin = menu.addItem(TM.get("fonction2"), iconAdmin, null);
        admin.addItem(TM.get("sous.fonction2.1"), iconSousAdmin, action1);
        admin.addItem(TM.get("sous.fonction2.2"), iconSousAdmin, action2);
        admin.addItem(TM.get("sous.fonction2.3"), iconSousAdmin, action3);
        vert.addComponent(menu);
        vert.addComponent(controller);
        controller.addView("customTableControle", CustomTableControle.class);
        controller.addView("customTableCategorie", CustomTableCategorie.class);
        controller.setFailsafeViewName("customTableCategorie");
        mainWindow.addComponent(vert);
        setMainWindow(mainWindow);
    }
    private MenuBar.Command action1 = new MenuBar.Command() {

        public void menuSelected(MenuBar.MenuItem selectedItem) {
            controller.switchView("customTableControle");
        }
    };
    private MenuBar.Command action2 = new MenuBar.Command() {

        public void menuSelected(MenuBar.MenuItem selectedItem) {
            controller.switchView("customTableCategorie");
        }
    };
    private MenuBar.Command action3 = new MenuBar.Command() {

        public void menuSelected(MenuBar.MenuItem selectedItem) {
            controller.switchView("customTableCategorie/50");
        }
    };

    @Override
    public void firstApplicationStartup() {
    }
}

and
string.properties [en]

app.titre= Title of application
fonction1=anglais
sous.fonction1.1=anglais
fonction2=anglais
sous.fonction2.1=anglais
sous.fonction2.2=anglais
sous.fonction2.3=anglais
label = this is a Label
odbc.btn.ok=OK
odbc.btn.cancel=Cancel
odbc.btn.yes=Yes
odbc.btn.no=No
idbc.btn.ok=OK
idbc.btn.cancel=Cancel
ddbc.btn.close=Close

string.properties [fr]

app.titre= Titre de l'application
label = c'est un Label
fonction1=français
sous.fonction1.1=français
fonction2=français
sous.fonction2.1=français
sous.fonction2.2=français
sous.fonction2.3=français
odbc.btn.ok=OK
odbc.btn.cancel=Annuler
odbc.btn.yes=OUI
odbc.btn.no=NON
idbc.btn.ok=OK
idbc.btn.cancel=Annuler
ddbc.btn.close=Fermer

here is the tree of my project
I do not see the concern, why it does not work.
language is alway in French
I use version 1.2 tpt and vaadin 6.7.5

thank you for your help