order get_posts attachments from media library

Where is the mistake? I’m trying to get all the media from the library (works) and order them in a specific way (doesn’t work).

$args = array(
 'post_type' => 'attachment',
 'numberposts' => -1,
 'post_status' => null,
 'post_parent' => null,
 'orderby' => ID,
 'order' => ASC
 );

 $attachments = get_posts($args);
 if ($attachments) {
 foreach ($attachments as $post) {
 setup_postdata($post);
 the_attachment_link($post->ID, false);
 echo '';  }
 }