No Sound In Vista 64bit / Digital Audio

I decided to rebuild my MediaCenter pc the other day. The previous PC worked but was getting slow. I mention this because all of the connections up to the PC were working fine for many months. So after building this PC and installing Vista 64-Bit I go to install my Audigy 2 Value's drivers. It said no product was detected, however windows Vista seemed to install some of its own "Audigy" drivers so I just moved on. I go to test the sound and I see the windows "digital" volume bar moving but I am not getting any sound. I then decide to check my connection. I am connecting it from the digital out to the dongle provided by Creative (it has SPDIF & Optical in / out), and all seems to be fine. I assume its fine when I see a red light coming from the dongle's optical audio out. If I have it plugged into the wrong port on the Audigy there won't be any light. From there it goes to my AMP. I know the problem isn't from the dongle to the amp because none of those components were changed. When I set this up some time ago I remember a setting I checked (I don't remember if it was XP or Vista) that enabled DigitalAudio out only. I thought with Vista only outputting "Digitally" (the speaker volume bar does not move) everything should be fine. Any idea why I can't install the creative drivers? I think I did that in the past and everything worked fine.
I feel like I am so close and it's something so simple....
Nick

I did more testing last night. If I right click on speaker, click playback devices, highlight "digital Audio Interface" (that volume bar moves when sound is playing) then click properties. Under the Supported formats tab there is a test button. If I select DTS or Dolby Digital and hit TEST I can hear the test sounds just fine!
Now I am really confused.

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No Sound In Vista 64bit / Digital Audio

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