Using Archive Link to attach invoice .pdf for review in SWBP

I recently added a new content server to use with 'Store Business Document' to allow users to attach documents to POs for review. The attachment of the business document works as expected. However, in SWBP, the attachment using archive link is not show in the list. Instead the user must first open the PO, click on the object services button, click on the attachment list, and then open the attachment.

If I attach a note, it works...

But not for 'Store Business Document'...

Any ideas?

James