That did the trick, thanks scook!
In doing this though, I then lose the ability to use my primary sound card for listening, and the project needs to be changed to 44.1.
I also found out that I lose all of my mappings when I disable my primary audio interface. I'm confused at how this should work in workflow... do I need to render a project down to an audio file and import it into a new project to work with it? Having it change the project bit rate AND lose all of my other track mappings (20 or so of them) just doesn't seem practical...