Cannot view an attachment created by another page.

I have a customer facing page that provides for pdf attachments. I have an administrative page that needs to view those attachments.

Just learning about attachments, so the customer page has the add, view and delete buttons and they all work flawlessly. The administrative page also has the add, view and delete buttons and they work flawlessly. (all buttons don't need to be on both pages but I'm debugging) The problem is in the administrative page when attempting to view the attachment created by the customer page - it crashes. The administrative page can successively delete the attachment created by the customer page but it can't view it without crashing. What is displayed is this: