how to force language in android application

Possible Duplicate:
Changing Locale within the app itself

in my application I need to "force" language let's say that I have locale in english as default polish and finnish, according to that post I had created function posted also bellow, function is called in createActivity(), but the problem is it does not work.... any idea why? Any suggestions?

private void setLocale(String localeCode){
        Locale locale = new Locale(localeCode);
        Locale.setDefault(locale);
        Configuration config = new Configuration();
        config.locale = locale;
        getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
    }