my boy is 15mths but so far i dont hav dat problem. I let him play during daytime so he sleep less, before bed, i will allow him to watch one of his fav cartoon while drinking milk so he will fall asleep.
One thing is he wants me to be right beside him for him to go to sleep. Y dont you try doing that? Mayb your son wants d mummy and daddy to be beside him while he's sleeping... (^,^)