You might want to try upping your exercise numbers - maybe to 45 minutes a day instead of 30. If you're exercising, 1400 calories a day doesn't seem to be too many, but maybe try cycling between 1200 one day and 1400 the next, and so on.
I don't think you need to be on a "set plan" to lose weight - Weight watchers worked for me up to a point, and then it stopped, and calorie counting has worked fine (just beware of sodium!).
You may also want to try incorporating more fruits/veggies into your diet and cut out some processed foods (if this applies). I don't really believe in cutting out a certain type of food, like carbs, but you may want to switch from white carbs to whole grains, that type of thing.
Good luck