Vicki, Don't give up, there are always going to be times when you've worked really hard and nothing comes off, then next week you have a great loss.
The comment Harrie made about not eating enough is really true. The very first time I did SW it was with my mum, I ate and ate and ate mum kept telling me I was eating too much and I wouldn't loose anything. Came to weigh in and I lost 4 times more than my mum. You really can not eat too much super free & free food, that's why it is free!
Oh Elaine, it really does feel awful to gain but you are still lighter than when you started!