L.W.
stick it out.. all kids go thru a digression when traing. hell mine did just recently and it was due to my girlfriend having a baby.. and once he got the im older i get stickers when i do things right and i get special treats for it.. (yea a little reward wiht stickers helps. then you let them pick out something special (inexpensive) after a week of stickers.
and dont cavein..\
Boys are the toughest from every one i talk too soo stick to it.. and dont get mad at him (even though its frustrating..) good luck