I'm assuming that he's been checked out medically and that all is well from that perspective. On the behavior management front, I'd make a little adjustment. Figure out the thing he most likes. Let's say it's a video game. Have him earn it on a day by day basis. He would earn it by staying dry for the day. Or, alternatively, he could earn a certain amount of time playing the game for each half-day he remains dry. So each day stands by itself, and every morning when he wakes up he has a new opportunity to earn the game (or whatever you decide the incentive will be).
Thanks so much for your imput, I have not tried the half day and work up to a full day slowly. I will try this out. We are on our last week of school and I am hoping to get a handle on this soon so that I dont have to spend the summer in turmoil worried if he will stay dry or not.
Terri