Automatic ORDRSP idoc creation problem for customer order

Requirement;

When client received order from customer through EDI, while creating order it has to check is there any difference in the order quantity and confirmed quantity. If any difference reason code should set up automatically at line item level (I configured reason code as "Quantity short" and it's not big deal to get this in user exit). After inbound EDI order process, order response should invoke only one time that too first time (Not all the time for all orders) when there are line items exist with "Quantity short".

First I'm trying to kick out ORDRSP Idoc from manually created order. While creating order which has confirmed quantity less than order quantity I setup item level reason code as "Quantity Short".

I created condition table with conditions Sales org, Order type, Sold to party(from KOMKBV1) and item level reason code (from KOMPBV1). I maintained condition record, partner profile. But Idoc is not generating automatically after I created order manually with reason code at line item level.

Can any one help me on this.

Thanks in advance.