Product pricing in FPD vs. Woocommerce

My issue is as follows:

I have created all my products in FPD and created a new product for the required category in Woocommerce. So, for example, I have a custom T shirts category. In that category there are three different fabrics. One is $20.00, one is $30.00 and one is $40.00.

Once I create the product in Woocommerce and link to the FPD category, how do I configure the product so that when the customer chooses one of the three options the price under the canvas changes. If I use WooCommerce product variations then there is a dropdown box under the canvas with pricing but the product image doesn't change. If I keep the product "Simple" without variations and put the price of each FPD product inside the FPD interface then the price doesn't appear at all on the category page for "T-shirts". I need the price to update as the customer changes their option and then the price range to show under the product thumbnail both on the category page and also wherever else the product is showcased (ie, Featured product section).

Is this a setting I am missing? Please help.