In fact the problem have not solved yet
Let me clarify my problem here.
we have 2 version of the files
original file is 434-869-1-RV.doc
revised file is 434-869-2-RV.doc
When we send the email, we see 434-869-1-RV.doc in the attachment field. (this is the bug)
But at the end the sent version would be the latest revised 434-869-2.RV.doc (this is what we want to show)
Where can I fix the bug? Thanks a lot.