I know that you may think this is a bit of a bizarre comment, but it may well be that you are not actually eating enough. losing weight is a strange thing and unless you become anorexic with the amount of calories being very little then you will actually lose more weight at a closer amount to what you should be on normally rather than cutting back the calories further.
It may help you to actually eat more, as at the moment you are doing a lot of exercise as well on top of your normal daily requirements, if you don't give your body enough nutrients for this it will try to slow down the metabolism (which it does by reducing muscle mass) so that you lose weight more slowly.
as a woman you should not be reducing to less than 1500 calories a day and you should possibly eat slightly more than this on the days you exercise.
Also xenical works best when you have nearer the fat allowance for each meal and your menu look svery very low in fat. We all have to remember that all cell regeneration needs some fat to be effective so it may be that you need to actually increase this part of your diet to get the best results.
Jacqui