Weight Loss Part 3 or 4

Ok. VERY frustrated. I'm not losing weight. I've been doing this for 4 weeks now. I just got really serious about it a week ago but have still not lost any weight. I'm doing 20 minutes of circuit training with jillian michaels on the 30 day shred and still nothing! I'm also swimming, walking and using biggest loser video game. UUUGGGGG!!!!!!!! I am still at 224! When will I see results???? I just don't understand. I've also lowered my calorie intake to 1600 calories. I'm trying hard. I'm going to try harder I guess. Lord, give me the strength to get my life back in order.