my mouse keeps dissapearing in Sonar

That kind of cursor problem usually means that the application (Sonar) and the video driver have different ideas about how the cursor works. If updating/reinstalling your video driver doesn't fix it, you'll probably have to go through Cakewalk support.

My cursor disappears if I insert the Gater Style Dial and try to turn the knob BEFORE turning Gater on. I recently figured out that if I turn on the Gater with its power button then my cursor does NOT disappear when I adjust the Gater. When it did disappear I had to precariously find "save" (fortunately whatever the invisible cursor was hovering over still changed appearance on hover) and shut down then re-open Sonar.
 Do you know precisely when you lose your cursor or does it seem random?
 
edit: I just tried to duplicate this on my home machine but it instances Gater in the "on" state. I am 99% sure it is instanced in the "off" state at my studio (ok 50% sure). I couldn't get the cursor to disappear with Gater here at home where my comp is much more modest than at the studio (rig in sig is studio). I can make it disappear at the studio repeatably.