Pending Order Hold Stock not working in woocommerce

I've already setup Hold Stock (minustes) in here WooCommerce > Settings > Inventory > Hold Stock (minutes). But my pending order is not cancel.

i also try this method but can't.

http://ift.tt/1BZwKZx

How can i solve it ? Please let me know it. Thanks

My wordpress version is 4.0.1 & WooCommerce version is 2.1.12