[Rohit Ketkar]

Are you trying to shoot handheld or using any support like tripod, bean bag etc?
If you are shooting handheld and if subject is in motion and if its fast, then my guess is that much shutter spped will not suffice as you are also moving camera along with the subject.
If you are using any support then as sudhir sir suggested sharing image might help giving feedback.

[Rohit Ketkar]

Thanks.