Woocommerce Custom Function - Error

Hi, I'm trying to create a very basic function that will display an image on a single product page based on the tag that is selected. The reason for this is that each item may have a different quality added to it.

I've created the code below and set the proper tag but it does not echo the image. Can anyone see if there is something wrong with the function?

Here is a link to the product page for reference: http://shop.iwiathletics.com/product/mens-lifestyle-t/

Here is the code I have generated:

add_filter( 'woocommerce_single_product_summary', 'woo_driproduct', 45 );

function woo_driproduct() {
    if ( is_product_tag( 'drirelease' )) {
    echo "<div class='driproduct'><a href='http://shop.iwiathletics.com/drirelease/' target='_blank'><img src='http://shop.iwiathletics.com/wp-content/uploads/2013/08/drilogo.png...";
    else {
        echo 'hey!';