get_categories – hide_empty=0 not displaying categories that are empty

Hello. I am trying to make a check box with categories for users adding content from the front end.

<?php
					$categories = get_categories(array('orderby'=>'name','parent'=>3,'hide_empty'=>0));
						foreach($categories as $categories){
							?>
                            	<input name="categories" type="checkbox" value="<?php echo $categories->cat_ID; ?>" /><?php echo $categories->name; ?><br />
                            <?php
						}
				?>

I am currently using this to create the checkbox.

It works fine, except for the fact that the checkboxes are only displaying for categories that have existing posts.

I am using the hide_empty to display the empty categories, but it does not seem to be working.

Am I missing something within in the provided code?

thanks.