6-year-old son's behavior in school

[Lynette0722]

My son will be 7 in dec...we have been having a continuous problem with his behavior since kindergarden...now in 1st grade the past couple of months everyday he's talking, roaming the classroom, refusing to do his work, throwing objects, and putting his hands on others...he is consumed to his room almost everyday...no tv, no outside or inside playtime, i've taken halloween from him, and i've told him if he keeps it up he's going to lose his b-day and x-mas next...it still is not working...i try to talk to him but its always an i dont know answer to everything...he won't open up to me...i've taken into consideration that he might be having issuses now with never getting to meet his real father (which died while i was pregnant with my 6-year-old) but he's had a postitive male figure in his life since he was 3 (which he calls daddy)...i just had his brother 6 months ago but i don't treat him any different then before my infant was born...i still tell him i love him everyday, I give him hugs & kisses, read to him, and try to do things with him by myself but that doesn't work...i did have him tested for ADHD last year and he's borderline...the school came up with a plan for him but he's still having problems everyday...please help...thanks