Nat2,
Use a photo that you think is overexposed. Using the info button on your camera, look at the settings your camera chose.
Now, flip your camera over to Manual Mode and take the same picture under the same kind of conditions, but this time, manually dial in a faster shutter speed, or a smaller aperture.
(I suspect your shutter speed might have been too slow for a moving subjects in the original, but that's just a guess on my part.)
Steve Thomas
