List child categories of parent category

Hi at all,

i have this code:

<?php

$parentCatName = ‘products’;
$parentCatID = get_cat_ID($parentCatName);
$childCats = get_categories( ‘child_of=’.$parentCatID );

if(is_array($childCats)):

foreach($childCats as $child){ ?>

<h2><?php echo $child->name; ?></h2>

<?php
}

endif;

?>

I created a parent category and some children categories.
I would like to display the name of every child category… but i don’t understand why it not working. The if statement give me TRUE when check if (is_array($childCats))… Someone can explain me where possible is the problem?