change unit selling price using OE_ORDER_ADJ_PVT

[surfraz_urs]

Hi ALL,
I am trying to change the unit selling price of an item using oe_order_adj.price_line.

Requirement:

On existing line_id, I am using the oe_order_adj.price_line to have change in unit selling price of the item, with in the line record.
The new price has to be picked from qp_list_lines and that has to be applied to the unit selling price of the line record.
But I am not getting that functionality done.
Please let me know the solution to achieve the same.

Please guide me in this regard.