What is your O.S.? I had a wonderful, hard use relationship with Adobe Audition 2.0 in my XP. When I upgraded to a faster computer, it came pre-loaded with Vista. It was a trainwreck. I had the same problem as you, BUT, it wouldn't let me uninstall ALL of the elements of the program to get it right. I had similar problems with other programs.
I finally returned the computer and had a new hard drive installed, with ME installing the elements of Vista I wanted, plus Service Pack 1 from MSN. It works perfect now.