Hi Matt
In the past I was using MME in BB, and Asio in Adobe Audition with my Audiophile 2496, and all worked perfectly. The problem only started when I used the Fast Track USB interface, and the drivers for this particular interface have an issue with multi client operation (see my last post)It is a known fault with the device drivers.
Using MME in BB with the USB Fast track did not solve the issue...

thanks anyway