i'm having trouble setting up the mixer as the audio interface and play sounds from windows.
i already did this
-http://answers.presonus.com/1150/how-setup-windows-audio-with-studiolive-console-rack-mixer

but windows keeps playing sound back from the PC output, and when i try to test the sound by right cliking on the presonus firestudio audio on the PC audio settings, it brings a pop up saying that the test sound cannot be played.

thanks a lot for the help