Scrolling forms

sometimes i find it’s difficult to scroll down a form of about 3000px height.
if i do it slowly, the scrolling stops before reaching the bottom.
to be able to go down i must scroll it up and then scoll quickly to the bottom.
but then i have problem to go to the top.
what am i doing wrong?

My first reaction to this is that your form is too long and will be clumsy for users. Can it be split up into smaller pieces which would be easier to work with?