PAR_ROW_ID cannot be null in siebel

I did following things.

1)I created new BC(XYZ) based on S_ORG_EXT_XM table.

2)fetched account name, account number fields from account table using join.

3)gave XYZ BC to account BO along with newly created link for account and XYZ BC

4)created applet,view and all necessary things for UI configuration.

my problem is whenever i create new record in that applet. it gives me error like

1]an error is occured writing to a record

2]column PAR_ROW_ID in table S_ORG_EXT_XM cannot be null.

thanks in advance for help