Variable Products

Hello, I am trying to import variable products using .csv. I downloaded and activated the plugin addon for woocommerce. I downloaded a sample .csv file from here: https://drive.google.com/file/d/0Bx_szbefwadOTVBnd296ZmNiUEE/view.

I uploaded that sample but all the products register as Simple Products. How do I make them register as a Variable Products??