Master-Detail-Subdetail not getting refreshed when detail row changes

Hi, I have a the following table structure Customer Order Order History. Please run the attached sample. When you highlite a customer, my orders are getting refreshed properly. But whenever, my I highlite an order its order history is not getting reloaded properly. When I delete a customer, all the related orders and order history are getting deleted fine. I see the order history rolling along and getting deleted. Please let me know what I am doing wrong.

Try this. Make the DataSource on all three grid the same. subdetailGrid.DataSource = dataSet.Tables["Customer"]; Make the DataMember on the subdetail grid reflect the relation back to the master table.: subdetailGrid.DataMember = "CustomerToOrder.OrderToOrderHistory";

Clay, That worked!! thank you very much, - Reddy