You eat right, you exercise. You've tried to lose weight now for over a month, unsuccessfully. Just because you are eating healthy and exercising doesn't grant you a license to over-eat.
Many people exercise daily, but at the wrong intensity level.
You will still get great benefits from exercising daily, but if you are not working hard enough you will not burn enough calories to lose weight. In MOST cases you will not notice this gain, because you are losing body fat pounds at the same time. What this does do is keep the scale constant, frustrating many who are trying to lose weight. What IS happening, however, is your percentage of body fat is going down, which is a better indicator of health and fitness than any scale. Be patient and be prepared for this transition.