What you're doing wrong is following a highly commercialized weight loss plan that is ineffective.
Do you know what else is a highly commercialized weight loss product? Activia, cereals, health breads, diet sodas, etc.
What do they all have in common? Sugar and/or dangerous chemical additives that cause weight gain.
Stay away from anything advertised as low-fat or low-calorie. Look into counting carbs not points. Learn which foods should be avoided.