Automatic creation/assignment of batch during inbound delivery creation

I am looking for a soultion to create batch automatically (like Goods receipt how system proposing/populating batch number) during inbound delivery creation (VL31N). Going forward the inbound delivery creation will be automated through IDOC. I maintained the following settings,

1.) IMG-> Logistics general-> batch management-> batch number assignment-> activate internal batch number assignment

2.) IMG>Logistics Execution>Shipping>Deliveries>Define Batch Creation Controls in Inbound Deliveries

selected "Batch installation, classification, SLED check"

3.) Logistics general-> Batch management-> Batch determination and batch check-> Activate automatic batch determination in SD

here i selected item category "ELN" and "DIGN".

But still i am not getting batch number automatically while creating inbound delivery.

I want to have a standard SAP functionality to populate batch number during inbound delivery creation. Otherwise please let me know is there any function module available to populate batch number? We are on ECC 6.0

Thanks

Regards

Rifaie