I played this not to long ago. It seems, and I don't remember how many buttons there were, but it is called Double Dribble for a reason. It seems one of the buttons you use is a button to dribble the ball. So find the button that dribbles the ball and keep pressing it. If you stop pressing it, you will pick the ball up, and if you press the dribble again they wil call you for double dribbling.