Have you checked with the M$ website?
After encountering two similar road blocks with WHS, I ditched it, installed a Linux server, set up Samba shares and now this wonderful machine is my web server, FAX server, Postfix mail server, has all the standard network services, and also runs my home security system (which I have integrated the video feed from three 930 and can manage them with ZoneMinder.
I could never have done this with WHS without *lots* of headaches.
I use Ubuntu Server. RH, Susise, also have nice server packages.
You may want to consider this approach.