I'm new to this site. I'm needing some advise. I have 2 children, a girl who's 5 1/2. Also, a son who's 3 1/2. My daughter is great. My son however, he has some major problems. He was the perfect baby up until he was about 18 months ago. He stopped sleeping in his crib, started displaying behavioral problems. It has progressively gotten worse. Getting kicked out of daycare for getting through child-proof locks, bullying, aggressive towards even the teachers, and running away out of class and out of the building. I have had him out of daycare and in the care of my grandmother (who keeps him while I work) since June '07. I have been seeking assistance and am not getting much insight as to why he's acting this way. He has become violent towards myself, my daughter, grandmother, other children, or anyone of athority. He's become out of control... A few weeks ago, I got him in with- another doctor. She said she couldn't diagnos him with- anything because of his age, but wanted to start treating him for ADHD. He's been on Focalin XR for 2 weeks, but his behavior is staying the same, if not worse. ANY ADVISE????