VI01 - Exit to Populate Data in Profit. Segment (COPA)

Dear All,

I'm creating the Shipment cost document via FM: SD_SCDS_CREATE using custom program. I would like to populate the data in Account Assignment -> Profit. Segment for field (eg: CO-PA-ARTNR). However, this exit EXIT_SAPLKEDRCOPA_001 (setup in KEDR) is not trigger and unable to populate the value. Appreciate anyone could advise me. Thanks.