Problem while posting ORDCHG - 860 message

Hi All

I have created a third party sales order through ORDERS Idoc and i would like to change the sales order through ORDCHG Idoc. When i am trying to post the Idoc, it is failing without giving any error message.

I am using the below values in the Idoc.

E1EDK03-ACTION = 003

E1EDP01-ACTION = 002 ( i am changing only qty in the item)

When i run it in foreground, it is going till quantity field in the ORDER at item level and failing suddenly without any error message.

Can any one suggest on this?