I Beleive he should first select the CV he want to stick to the curve, and then click on the curve, just highliting it, not selecting any part of it, and then drag the point toward the highlighted curve. Otherwise he could snap the CV to a edit-point, (snap to point) and then drag the point along the curve after he de-selected snap to point, and just enabling snap to curve..

That's what I'm currently doing. Probably incredibly ineficcient, but it works.