Cannot add new PDF port for Adobe Acrobat 8.1

Hello all--

As the title states, I can't add a new PDF port for Acrobat 8.1.

I can create a PDF just fine through the existing port (to the desktop), but
I have an Access/SQL app that needs to be able to put a PDF in a specific
folder on a network share.

In WinXP I can create a new port with the share as the PDF destination.

I have no trouble creating TCP or LPR ports, just PDF. I have contacted
Adobe and (of course) it's "...something in Vista..."

Has anyone else had any trouble creating PDF ports on any version of Vista?
I tried with my own laptop running Ultimate and Acrobat 8 and had the same
problem.

I know I can downgrade to XP, but I'd rather keep Vista.

Thanks,
Joe