Everytthing that I have ever read or heard, in sources other than JC, you should not go below 1200 calories. Your body needs this many calories just to function and if you go below this many calories, you will actually not lose because your body will go into starvation mode and your metabolism will slow down not speed up.
My JCC just called the dietitian for me as I had not been losing at 1200, I exercise quite a bit, and due to my activity level, they felt that I was not getting enough calories and probably had been in this "starvation" mode. I am back up to 1500 calories and have lost for the last three weeks.
A lot is going to depend on your activity level, how much you have to lose, etc. If you are not eating everything on your menu, that could be why you are not losing. Cutting out foods does not work - I know - I was trying everything while my body was shut down. None of it worked. It's counter-intuitive to increase calories while losing weight, but it worked for me.
You may want to discuss this with your JCC further and have them call corporate for some advice.
Good luck!