I have run the hardware test, all fine. I have uninstalled and reinstalled the Duet installer multiple times, both the version that came with the unit (Dec 07) and the May 08 v 1.7 from the apogee web site. Nothing works.
I have heard the unit has log in and multiple user problems. That may be part of the problem as I have two users on my Mac Pro, both are administrators but the only time I have been able to get duet to even halfway work is if I install it under the user name that was created when I first turned on the computer out of the box.
I emailed apogee support yesterday but have heard nothing.
I am beyond frustrated with this situation and have already wasted hours and hours trying to get it resolved. I am especially angry because for the few minutes I was able to get sound out of this thing yesterday, it sounded great. I am going to return the duet, and just say #%@# it, and use the analog plugs on the back of my Five Thousand dollar brand new Macintosh. I hate leopard.