First thanks for supporting BCF. That error usually means you did not pick a price option from the drop down before you clicked Order. Just above the order button there is a drop down where you need to select one of two options. You will notice they are both the same price, but the second option has an * next to it. Selecting the first option is a one year "non-recurring" subscription. The second option, with the * means it is a one year subscription that will renew automatically after one year.
Hope this helps.
Basil