Create business activity attachment from idoc

Hi,

Has anyone try creating business activity attachment using idoc type CRMXIF_ORDER_SAVE_M01 with message type CRMXIF_ORDER_SAVE_M?

I manage to post the idoc successfully but the attachment did not appear in tcode CRMD_BUS200016. Anyone know what happen?

There is a header E101CRMXIF_ATTACHMENT_LINK and item under segment E101CRMXIF_BUSTRANS_ITEM. Do I need to populate both segment?

What should be input in the URL field?

Regards,

BB