There are a lot of reasons why the promotion egine would decide not to select a promotion to process. And even if it selects a promotion, the processor may not always run Evaluate method. So, quick checklist:

1. Is the SalesCampaign that has the Promotion as child in the same market as the cart?
2. Does the promotion have any coupon code that isn't added to the OrderForm?
3. Does the promotion have everything filled in in its conditions, including correct currency?

Hi Joel,

Thank you for your replay.

I checked all the items that you had mentioned.

I didn't apply any coupon code for a promotion. I checked markets and currency also.

But still, now I didn't get the promotion processor hit to check whether the custom promotion runs properly or not.

Hey Vetrivel,

I made a blog post about these issues, seeing as I've have seen them quite often! Take a look and do tell me if you can find your solution there. 

http://avensia.com/joel-yourstone/why-isnt-my-promotion-showing/

If none of those tips work - please show me code for:

1. Running promotions on your cart
2. The promotion data object
3. The promotion processor
4. (If you have implemented your own) PromotionEngine

And the Commerce version!

Thank you, Joel, I will see your blog and let you know.

Thank you, Joel, I referred your Blog and also found my mistake. 

I didn't add the processor for each promotion types and also I made a mistake on the Coupon code.

My filter may not allow accessing the promotion processor due to the coupon code.

I changed my code and the promotion processor hit on Debugging.

Thank You.