If you've restarted many times you may not lose as fast as you did the first or second time. The body gets used to the diet; it 'remembers', so you don't have the benefit of the initial shock to the system. Even so in the end you will lose on so few calories, you have to! But the body is very smart and will try to stop you losing. To keep you alive. Just give it time and you will probs see a big loss, practically overnight.
Weighing once a week, and no more, is the best way to go.