this is an article for SHAPE magazine
"The best way to lose weight and keep it off is though a combination of long term caloric restriction and regular, moderate intensity exercise. A review of literature by reseachers from Harvard showed that people who combined a reduced calorie diet with exercise lost about 2.5 pounds more than those who used low calorie diets alone. People regain weight following both programs, but those who continued exercising are most likely in keeping it off in the long run."
so use the scale to balance food and exercise. You have to cut down or make better choices on your food intake.