setCommandListener(this);
mailScreen = new MailMainScreen(this);
calendarScreen = new CalendarMonthScreen(this);
tasksScreen = new TasksScreen(this);
contactsScreen = new ContactsScreen(this);
settingsScreen = new SettingsScreen(this);
try {
Image mailIcon = Image.createImage("/Mail-48x48.png");
append(MAIL_TITLE, mailIcon);