AU Lab & Soundflower

Hi all

I'm having trouble using AU Lab in conjunction with Soundflower and my Apogee Ensemble firewire sound interface.

I am trying to route sound from my computer (iTunes, Spotify, DAW etc) through AU Lab using Soundflower before reaching my Apogee Ensemble interface. However I'm hearing no sound and not seeing any level on the input or output of AU Lab when I do this.

Let me run through the process:

Playing music from iTunes:

System Preferences -> Sound - Ensemble selected as Output...

AU Lab & Soundflower