Cannot display taxonomy images, help!!

Hi
Im listing child taxonomies of ‘2014 past issues’ within a page template & have assigned images to each one.
http://marketing.ie/past-issues/2014-past-issues/

However as you can see the images are not showing.
Ive tried:

$url = apply_filters( ‘taxonomy-images-queried-term-image-url’, ” );
if ( ! empty( $url ) ) {
print ‘<img src=”‘ . esc_url( $url ) . ‘”>’;
}

But no good. Any ideas much appreciated!

cheers
John

https://wordpress.org/plugins/taxonomy-images/