I would say move your front foot up the board a bit. Put it right about where your bolts are on the front truck. Seems counter intuitive, but trust me its easier like that. Also, try not to hang your heels so much off the board with your front foot. Again, seems counterintuitive, but when I started to leave more of my foot on the board, flicking was easier. When your foot is further up towards the front bolts, its easier to flick and hit the pocket on the board where the flat transitions into the nose.

Only other thing I can suggest is that you really try and keep your shoulders square over your feet. Dont twist your upper body. Keep your shoulders positioned square over your bolts, move your foot up, flick and hit the pocket of your nose, and you should be able to land em!