Sorry dub..I was a bit slow on the draw. Mike is correct in the post above me though. If you are using X1 x64, it won't work. It's for the 32 bit version only. So it wouldn't have saved you any headaches there. But for all versions of Sonar 32, it's worked wonders for me. I don't use x64 all that much because I just don't seem to need it other than for large synth type stuff. My pc using 32 bit Sonar rocks so hard I don't even have to freeze tracks thankfully.
-Danny