Rebate Not Appear in Billing .

Hi,

I Have created the Rebate agreement ( based on BO02,BO03). and in pricing actual value stored in Subtotal 7 and rebate calc type marked as req 24.
the Rebate not reflect in billing document. when i try to enter manuallt the rebate calcu type in the pricng calcuation the value as Zero.

even when i check the Item condition detail the rebate agreement number which i created is appearing here.

Could you please advise how to solve this issue? did i missed any configuration.

i checked in forum not getting the sol.

Thanks

Bala