error in upading the net price amount for the PO line item

Hi all,

I'm using the 'BAPI_PO_CHANGE' for inserting a NEW PO line item for the given purchase order no(PO). A new item number has been generated. But the amount which i pass for NET_PRICE is not updated correctly. It takes some other value instead of the value i give.

For some PO, its working correctly. But for some other, its not..

Could anyone pls tell me why this problem occurs, and what are all the STRUCTURES, and TABLES inputs needs to passed for creating a new PO line item?..

Its very very urgent..

Could anyone pls help..

Regards,

Shanthi