LSMW CRMXIF_ORDER_SAVE_M02 upload attachment

Hi

does anyone know how to upload a batch of attachments using the above interface, in maintain activities.

The attachment links should upload using source structure E103CRMXIF_ATTACHMENT_LINK. However this has not worked. Has anyone been able to create attachments by importing then into CRM by using an IDOC interface? If so how did you get this to work.