Do you integrate with WooCommerce?
If you are using the OptimizePress 2 Theme with WooCommerce, we now have a plugin which ensures compatibility with our blog templates. Click the link below to download the plugin (install this via the Plugins > Add New > Upload Function):
If you are using a different theme on your site you will need to contact the theme author to check compatibility.
Please note that by default WooCommerce will use your theme templates for the cart and checkout pages