nah really, i assume your catching it with your back foot? and splitting your legs a bit to do the fingerwhip? try not moving your front foot so far away from the deck and concentrate on getting both feet on the deck.
Ride up to the quarter, air out, bring the deck up to you and tap it, and get your hand on quickly. You aren't going to get any real advice on here, you just have to go out and land it.