Taxonomies Problem

Ok, so I’m trying to make a custom widget on a product page, and I can get the widget to show up however when I add code like…

<?php if ( in_category( 'Shirts' )) { ?>
&bull; Shirts
<?php } ?>

The category is not read or printed on the widget. I have tried every possible Taxonomy in place of “in_category” like product_cat, in_product_category, and many others. The selected category is in the product categories. What am I doing wrong?

I’m using the latest Version of Woocommerce (Version 2.0.14) And here is a link to the an example product on my site. Using Elegant Themes (StyleShop.) https://www.shop.abandonedar.com/product/map-privileges/
I’ve done hours of searching, and nothing works. Help is very much appreciated! Thanks in Advance!

https://www.ads-software.com/plugins/woocommerce/