setProgressBarIndeterminateVisibility(true) doesn't work

I wish to use a progressbar while an asynctask is working but just doesn't appear, I've got the following code:

protected void onCreate(Bundle savedInstanceState) {
    requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_score);
    ActionBar actionBar = getSupportActionBar();
    actionBar.setDisplayHomeAsUpEnabled(true);
    actualizartablaF();
}

private void actualizarTablaF(){
    setProgressBarIndeterminate(true);
    setProgressBarIndeterminateVisibility(true);
    SharedPreferences sp = getSharedPreferences("Preferences", Activity.MODE_PRIVATE);
    String param = "?name="+sp.getString("Name","Josema");
    new ScoresAsyncTask().execute(param);
}

And, in the postExecute of my asyncTask I've got this:

protected void onPostExecute(HighScoreList highScoreList) {
        scoreActivity.this.setProgressBarIndeterminate(false);
        scoreActivity.this.setProgressBarIndeterminateVisibility(false);
}

It just doesn't show any progress indicator and I can't find the mistake. Thank you.