first off if you are using pullups take them off him and get rid of them. they are too much like diapers and they don't know the difference. secondly take him like every half hour. if he goes then wait another hour. make sure you keep doing this til he actually goes. when he does clap and yell good boy!!!!! praise him! let him know what he did was right! I just trained a set of twins last summer. it only took about a week once I got them out of pullups. get him bigboy underwear today.