Okay take a look at my screenshot above. I have the correct driver loaded, as do you. When you click control panel, your driver settings should pop up as mine are on the right. Confirm that it recognizes your Alpha.
Now in the background on the right you see VST Connections-Outputs. I have a bus setup called Stereo Out (which was added by clicking Add Buss>Stereo). Now you see in the blue area on the right my outputs. Left click in the blue fields to select your Alpha's outputs. If you only see Not Connected, then you have driver issues, or you have another application open stealing them.
Inspector routing is normally configured automatically.
Asus R500A-RS52, Windows 8, 2.6gHz i5 -3230M, 6GB RAM,
Cubase Artist 7.0.6, Wavelab Elements 7, Focusrite Scarlett 8i6, The Grand 3, Melodyne Essential, Superior Drummer, EZDrummer and Pop! EZX, Samson CO1, Yamaha P-35, Mackie MR5mk2 monitors, and more....My tunes on: Soundcloud