View Filter Controls Setting did not auto generate for woocommerce custom fields

Hi,

I was making a website with woocommerce v2.0.12 with WooCommerce Views v1.2.3 and CRED Commerce v0.9.2 using Views v 1.2.2 and Types v1.3.1.

I followed the example given at http://wp-types.com/learn/create-an-ecommerce-wordpress-site/search-filter-and-results/ but I encountered a problem in Views where view filter controls setting did not auto generate for woocommerce custom fields.

Attached is the screenshot of the problem.

Please let me know how to solve this problem.

TQ
Eric