Google Analytics Query

Just been looking at my google analytics and I had this notification.

Missing Ecommerce Data
Property http://folksy.com/shops/PaulinesCrafts is configured for Ecommerce, but no transaction data is being received. Your site may not be tagged for Ecommerce.

Not really sure wat it means and whatI’m supposed to do. Any advice please.

Pauline

Think I may have sorted it. I’ve just reset it so hopefully that will work.

Pauline