update owned_by_id property i am using AML

I want to update “owned_by_id” for nearly 200 Parts what are the different ways to do it? I am currently working on AML approach for this, below is AML i wrote for batchloader tool. I am not getting any error but script is not able to update property. My input file contains two columns 1. Item_number and 2. owned_by_Id. Any inputs is valuable. <BatchLoaderPrototype> <Item type=”Part” action=”edit” version=”0″ where=”item_number=’@1′”> <item_number set=”value”>@1</item_number> <owned_by_id set=”value”>@2</owned_by_id> </Item> </BatchLoaderPrototype>   Thanks Sam