I agree with SnoWolfs analysis. You need to get a little lower at the knees and get over your edge more as you turn. This will couse it to really dig in. A good drill to use to feel what we are talking about is called j-turn washouts. Start by going straight and picking up a little momentum then without using any body rotation lean over your edge until your board turns for you. Keep leaning slowly until you either head back up hill or you slip out and fall lightly uphill. You will instantly feel a difference in your old turning method and this (which is carving).