How Can I change sort ordering (Sort='Desc') for Newspage.ss.

This working after click on "Novinky" ("News") menu item (image good.jpg):

class Page_Controller extends ContentController {
public function init() {
global $project;
if ( $this->ClassName == 'NewsHolder' || $this->ClassName == 'NewsPage' ) {
$this->ChildrenResorted();
}
..........................

}
function ChildrenResorted( $field = 'Sort', $so = 'DESC' ) {
return ( $this->Children()->Count() ? $this->Children()->sort( $field, $so ) : $this->Parent()->Children()->sort( $field, $so ) );
}

BUT.
This not working after click on item on item (normal Sidebar.ss ) under parent menu "Novinky" ("News") (image bad.jpg):
Items in Sidebar.ss (Children) are sorted by default.
Why? Where can I resort Menu(2) items before it shows?

Help me somebody, please?