Receipt API Not Working

Hi all,

Can I please get help with the following error when using AR_RECEIPT_API_PUB.create_cash.  The errors I get are:

1. Please correct the cash account assignment.
2.The entered values for the descriptive flexfield  AR_CASH_RECEIPTS is invalid.

I have checked that the cash account combination for the remittance bank is valid, I don't know why I get this error.

I have also enabled all the flexfields and declared as follows:

DECLARE
l_return_status VARCHAR2(1);
l_msg_count NUMBER;
l_msg_data VARCHAR2(240);
l_count NUMBER;
l_cash_receipt_id NUMBER;
l_msg_data_out VARCHAR2(240);