Well, I've followed the brief, one-paragraph directions in the downloadable PDF manual for the ASRock P43DE3 motherboard...

...And they don't seem to work.

I know my audio is hooked up correctly -- I use WinAmp to play my audio, and have installed the Multiple Output Plugin, configured it, tested it, and can definitely get the audio to come out of both.

But that's only for WinAmp, at the Winamp-application level. I would like for this to occur at the OS level, the same way it did with my old Asus IP35 Pro motherboard (that this is a replacement for).

For the life of me -- it just doesn't work. Help!