Does the tablet surface correspond to your screen?
Meaning, if you move your stylus from corner A of the surface to corner B, does your cursor move from corner A to corner B -- every time you do it? Or, if you bring your stylus to the center of the tablet, does your cursor immediately move to the center of the screen, regardless of where it was before?
If it doesn't do that, the tablet driver may not have been installed properly.
Another possible cause is if you have a huge screen and a small tablet... I have a 27" monitor, and I can't work with smaller tablets.