Change schedule line confirmed quantity using BAPI_SALESORDER_CHANGE

Hi experts,

How can I change the schedule line confirmed quantity of a Sales order item using this Bapi? For example, I am trying to change the confirmed qty on 2007.05.09 from 0.00 to 2.00. Please help!

Deliv. dat Order quantity Rounded qty Confirmed qty.

2007.05.09 2.00 2.00 0.00EA

2007.06.12 0.00 0.00 2.00EA

Best regards,

Chuong