I Need Help With my Kickflips, I can ollie but i can't seem to flip the board. (10 points best answer)?

i skate regular btw, i know the positioning of a kickflip and how to flick and everything but when i try to flick my toe of the board, it either ends up as a messed up ollie, or the board dosent even come of the ground when i pop it. please explain to me why this is happening, and tell me how to fix this. thxxxx.