I emailed the guys at tech support and this was their reply.
“The reason this is not working is because you are working with two different
color spaces.
Basically, HDMI can carry both the RGB and YUV color space. However, DVI
only carries the RGB color space. Our cards only output YUV. As such, the
YUV signal is being passed over HDMI but once it hits the DVI adapter it no
longer gets passed as the DVI adapter is expecting RGB.
As the colorspace conversion is just being passed and not converted, this is
why it will not work. We do have a product that will do the YUV to RGB
colorspace conversion but this is specifically from SDI to DVI. We do not
have anything that will do HDMI to DVI.
So if you take the HDMI out to a HDTV this should work.”
*Goes out to get a monitor that has HDMI input*