Try to speack with a gentle tone, make physical contact with him, touch in him gently and eye contact. One must make sure we first let go of your own anger when responding. One wants to be firm and use the appropriate force when teaching, when one becomes detached and approuches the child with what does he or she need seperate from ones reaction, may it be fear or anger then we can respond to his or her appropriate needs. Pay attention to the childs body language, if you have good rapport the instructions is being digested or not. One also has to remember other aspects as well, such has, hunger and fatigue, which will not allow the child to respond. Also if the child has been overpowered or underpowered the relearning process will take time and lots of repeat. Be aware of other adults that do not have this awareness and can be un-intionallly hurting the child, Teachers, couches, baby sitters, grandparents, etc. Good Luck