lagging in-game

i have this problem when i play the game, it lags when a player brings the ball up to mid-court and it continues to lag.. by the way i'm not playing online.. is the problem in the cd? coz when i re-installed the game it doesn't make any difference.. i need help, thnx

Do you have any programs running in the back round of your computer?

nope.. but do the processes count??