You haven't lost any weight because your body has gone to "starvation mode", this is why diets like the cabbage soup diet fail miserably, IF you lose weight it's going to be mostly water... fads like this are dangerous because you're denying vital nutrients [keyword: vital] to your body, protein is going to be gotten from somewhere because you can't function without it, so it's going to come from your muscle tissue [lipolysis in muscle] - If you want a good cleansing eat 6 small balanced meals everyday, you'll feel much better, less hungry and you'll lose weight eventually, also remember, you can't lose weight simply lying around, you need to exercise, 3500 calories = 1 pound of fat, roughly, to give you an idea - Juices alone aren't going to give you the fuel nor nourishment necessary to do a good workout.
Stop!