Freekick walls

Why can't I make my wall jump in freekicks when I put a player to lie down  behind the wall? Isn't the whole reason to lie down behind the wall that the ball can't go under the wall while the wall is jumping???? It's so annoying when  I accidentally make a player lie down behind the wall and I don't have time to get him out of there, so when the opponent takes the freekick, I can't make my wall jump.