Help with cutter tool?

I’m trying to separate 2 halves of a vector drawing element but when I select the cutter tool the orange vector lines turn blue and are unable to be cut. Any help would be greatly appreciated. I’m struggling mightily to learn this program (studio5.)

When you use the cutter tool, if you then use the select tool to select the part you just tried to cut off, are you able to select that half? Are you in the drawing view or the camera view? Perhaps you could send a couple of screenshots of what you mean when you say the orange vector lines turn blue. Do you have Show Strokes (K) enabled?

If you want to attach a screenshot, just upload your screenshot to a free site like photobucket and post the link here and we’ll be able to view it.