Problem with working area

Hi I have HS64 and everithing was going well except for an irritating problem. The cursor stand still in the point I left it when I shift the pen on another point. It never happened, the cursor used to disappear and re-appear at the same spot i touched the tablet, on the screen.

It's quite impossible to work like this because the working area doesn't match the area on the screen often. Why does it do like this and how can I fix it??

Thanks.