My b2evolution Version: 2.x

I've followed the directions given at http://forums.b2evolution.net/viewtopic.php?t=17036
to enable sticky posts. It doesnt work.

I did this:
in file _itemlist.class.php, line 567

case 'title':
case 'datecreated':
case 'ptyp_ID':
case 'datemodified':
case 'urltitle':

in file index.php,

# Additionnaly, you can set other values (see URL params in the manual)...
# $order = 'ASC'; // This for example would display the blog in chronological order...

// Stickies go first
$orderby = 'ptyp_ID datecreated';
// That's it, now let b2evolution do the rest! :)
require $inc_path.'_blog_main.inc.php';

?>

Then created the new element "Sticky" under Post Types.

Is there something else?