You can actually cause yourself to gain weight by not eating enough. I think that could be where you're going wrong. Your body thinks it's starving so it's holding on to the fat instead of letting it go. You should be having around 1600 kjs at each meal - a total of about 1400 calories per day. This will ensure fat loss but at a sensible rate.

I personally have lost almost 5kg using this method in the past 6 -7 weeks.