Hi Meegs. I know how disheartening it is once you reach a plateau! If it's any consolation it's a natural phase you'll go through. The body is an amazing thing and in order to survive famine it learns to adjust to stop you losing weight. Once it gets used to a certain amount of calories it will adjust its metabolism so that you can maintain weight on that amount. And it becomes very efficient with exercise so that you don't burn as much fat (it's one reason exercise becomes easier once you get better at it, your muscles become really good at doing those movements with as little effort as possible).
There are a few ways of getting through a plateau in theory.
You can shake up your diet. For instance, if you're currently doing low-fat low-calorie try increasing protein and fat and cutting down on carbs. Or vice versa. Rather than three large meals with fruit and veg as snacks try six smaller meals. Check how many calories you are consuming. Is it possible your portion sizes have crept up? Or could you be eating too few calories. If your body has gone into starvation mode you'll find your weight loss slowing to a stop. Make sure you're not cutting too many calories. It can be as detrimental to weight loss as too many calories.
Or you can change your exercise. If you're concentrating on cardio add some resistance work. Building muscles increases your resting metabolism so it could be enough to start your weight loss again. Try a new exercise that you may struggle with at first. If you are a runner try swimming. If you are a swimmer try tennis. If you love tennis try dance. Anything new that gets your body working in new ways should increase the amount of calories you burn. Or if you love the exercise you do now just adjust the time or intensity. Try exercising with 10% more intensity (running or walking faster, or a harder setting on your elliptical trainer, etc.) Or keep the same pace and increase the length of time by 10%.
There are some excellent tips for beating a plateau here: http://www.sparkpeople.com/community/as ... ts.asp?q=8
Good luck and let us know how you go! Congrats on losing the 9kg too. That's a great achievement! Don't get so caught up on this plateau that you forget to celebrate your success so far.