Have you tried it with IE8? No doubt, this is one of the machines out there whose web clients infamously don't work with IE9.
I have, our backroom computer (part of the POS system), is running IE8 (compatibility mode). Adding to the frustration, it has an internal speaker....all I hear is "click, click, click, click" the whole time I'm trying to select one of the buttons. When I connect the DVR to a separate hub, which is also connected to my notebook, I can at least mute the sound. The notebook is running IE9, compatibility mode. I can log in, but cannot pause/download files.
Thanks again, have to get this.