You may be six weeks into your current strength training program and you've lost the weight, but how come you're still feeling flabby? Well, for some reason your weight training is not getting the job done.
One reason you may not be getting as toned as you wish could be because you're not using enough resistance to challenge the muscles and stimulate them to grow -- Developed muscles are what makes us look toned. Women have been programmed to use light weights for fear of getting too bulky. It's important to keep in mind that those lovely, muscley ladies that grace the covers of magazines like Muscle & Fitness have worked very hard to look like that. Switching your 12 pound dumbbells to 15 pound dumbbells will not make you look bulky.
You need to use a weight that will fully fatigue your muscles (you couldn't possibly do another rep) by the last repetition. If you're feeling like you could go on and on with the current weight you're using, you should definitely think about going a little bit heavier.
Fit's Tip: A good rule of thumb is to increase your weight by 5% (or less) once it starts feeling too easy.