BAPI for payment for subscription

Hi,

I have to make a payment entry for a subscription order. I am using the bapi bapi_acc_document_post for this. Bapi is returning no error, and the document is posted succesfully. But the paroblem is when I go to JK02 and check the status of the order, its saying no payment is found ,and the status is not changed. Do i need to do any more process to trigger this ? or should I use a different BAPI..

please reply..