Hello-I have D7000 and I shoot sports photography. During the day I shoot the scene sports as it adjusts the iso and shutter speeds perfectly and I get excellent shots. For evening football games under the lights I set it to my user setting and turn the ISO sensitivity to on. I have always used the default settings and it adjusts the ISO (always to the max of 6400) and adjusts the shutter speeds appropriately. I always get great shots. The last few times I have used this setting it will not adjust to the maximum ISO or the Shutter Speeds and I have bad pix. My eyes are not the greatest so it's hard to tell on the field. I have taken my camera to a few places and they said nothing is wrong and maybe I did not turn it on--really? I have a night game coming up and I need for this to work again--Any advise?