Automated invoice not working

Hey All,
I’m finishing up my webshop as we speak.
But I stumbled upon something I can’t get to work.

When an order is completed, the only email being sent is the “Order completed” email. The invoice, which I also selected to be send, never sends. It only sends when I manually click send invoice, when in the order.

Any thoughts?

http://wordpress.org/plugins/woocommerce/