Activity Feeds for Sales order(System Entity).

Hi All,
I want to enable System entity(Sales order) for Activity Feed. But i am not able to do.

i am follow these steps, please let me know what i missed.

1. Enable Post Configuration for sales order.

2.Select My Orders from Filter Grid and Change 'my order' status to 'show'

3.Publish that entity.

But when i created record it not shows in Feeds.