Thanks Hamish... it was the red enable botton. I am still having a problem though. When recording thru the fast track ultra, I barely get sound or signal. I have to crank the channel on the ultra I am recording threw all the way up and still barely get anything..... sound or sound wave on the track. It's like something is blocking it. The core audio screen does show the Ultra as being the input and output devise, and of course that it is enabled.