Inbound Delivery Frieght Cost

Dear Guru's

My requirement is to cater the acutal freight amount to be enter before each GR. I think it can be handled easily by

PO >Inbound Delivery -> Shipment ->Shipment Cost Document --> PGR.

In PO, I have used confirmation control key inbound delivery for its creation and a condition ZFR1 (that is configured as copy to shipment cost). I go through the all transaction required to make post good receipt, once PGR is done, i checked its accounting document. There is no frieght cost (should come form Shipment Cost Document) entry exist.

What should i need to check?

Regards.

Rashid Masood