I exercise daily but cannot lose weight

I am a 42yr woman that is having the most difficult time losing weight.  I am in need of major help.  I joined a gym on 03-12-11.  It is now 05-22-11 and I have only lost 5lbs.  I currently weigh 210.  I am going to the gym every day after work.  I am on the elliptical or treadmill for 45-60 min, then I do the weights (every muscle group) for at least 30-45 minutes.  I am consuming around 1300 calories a day, and I am trying to drink at least a gallon of water a day.
I would like to know what I am doing wrong, or what I need to change.  Is there anything you can suggest? I really want to lose weight.
Thanks for listening.
Thank you for your question. First, is hard to calculate your BMI and if you are overweight as I do not have your height. From reading your email I wonder if you actually doing too much. Too much exercise can have the opposite effect, as it can place a lot of stress and strain to your body. I can make the following suggestions:
First of all it may be a good idea to consult your doctor and have a hormone check such as thyroid hormones. It may be good to check your hormones for possible pre-menopausal issues. Such issues could be slowing down your weight loss. Pre-menopause could start as early as 10 years before the actual menopause and it also be influencing body weight. Sometimes the changes could be minimal and may not be detected or you may not have any other menopausal symptoms.
Reduce your exercise. You need to allow some time for your body to recover from the exercise and also to rebuild its self. Also over-exercising can lower your immune system, decrease your muscle fitness and make you feel fatigued and run down. Moreover, it could increase the stress in your body which could be leading in hindering your weight loss. Decrease your gym days to 5 days a week and have two days for rest. You can still be active during those two days just avoid the gym. In addition, is best to do the weights first and aerobic exercise after your weight session. Your body uses glycogen to fuel the weight session and then having been depleted (or low reserves left) it uses fat to fuel aerobic exercise. You may feel a bit tired to start off but after a couple of sessions your body should adjust to burning more fat.
I would not recommend that you reduce your calorie intake any more as you are exercising and you do need the energy. However, you can make a few adjustments such as: 1. Have a delayed protein based breakfast. Increase your protein intake such as meat, fish and lower your carbohydrate intake such as bread, and pasta. Have carbs after you exercise. You need some carbs for your exercise; however, if you have carbs just before you go to the gym you could be burning those carbs. Well you do burn fat as well but you increase your fat burning. It may be also helpful to keep a diary of foods and drinks for a weeks as there could be things that you may not realize and add to your calorie intake (i.e. fizzy drinks, throat sweets).
Another thing to consider is that with exercise you would have increased your muscle which can be heavier than fat. It could be that you have lost some fat from your body but it does not show up as total body weight loss due to the increased muscle weight. After 2 months in the gym some muscle adaptations should have started taking place.
With the information provided these are the things I can suggest so far. There are a number of factors that can influence weight loss such as the amount of excess weight we carry. The more weight the harder weight loss can be, or things like lack of sleep can increase weight gain. I hope the suggestions are of help, and if you have any further questions do contact me again.
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