Ok sb help! i keep trying to do a kickflip but i jst cnt do the flick can someone give me help on it?

ok im really comfortable with my ollies and i get them 9/10 times the only problem is that when im sliding my foot up to the nose fer the flick i mess up and my friends say wen they watch me do it is tht i end it up as a heelflip so can someone help me with the flick