Credit memo not applying to an AR Tranasaction

Hi All,

I am developing a AR INvoice interface and I am using Autoinvoice import program to create the transactions.  I am able to create a credit memo using the autoinvoice.  But the credit memo is not getting applied to invoice.

The insert statement i am using is :

 INSERT INTO ra_interface_lines_all (
                                                         interface_line_context,
                                                         interface_line_attribute1,
                                                         batch_source_name,
                                                         line_type,
                                                         description,
                                                         currency_code,
                                                         amount,
                                                         cust_trx_type_name,
                                                         orig_system_bill_customer_id,
                                                         orig_system_bill_customer_ref,
                                                         orig_system_bill_address_id,
                                                         orig_system_bill_address_ref,
                                                         conversion_type,
                                                         conversion_rate,       
                                                   reference_line_id,