I wrote into my settings.php file (into default.settings.php file too):
$conf['theme_debug'] = TRUE;
$settings['theme_debug'] = TRUE;
$settings['theme_auto_reload'] = TRUE;
(These files have 777 permission.)
I have the "Theme developer" module.
I cleared all cache.
But the suggestions doesn't appear.
What else should I do?
(I have Drupal 7.)