I would eat more calories. I think your calorie intake is low and there may be a possibility that your body thinks it is "starving" and is holding on to its fat.

Also, I would eat more fat. This would prevent any extra proteins to be converted to fat.

Drink plenty of water.

It is hard to figure out what might not be working in a diet, without seeing your diet. If you can post an average day of eating it might be easier to help you.

However, those are my suggestions.