Browser scrollbar and Flash scrollbar ? I need help!

Now I have a problem about the scrollbar:

The height of my swf file is longer than browser height, so the scrollbar of
browser's occurred, if I scroll my mouse wheel, the whole flash roll down, but
the problem is that I have used a scrollPanel component which write by myself,
and in this situation, when I scroll the mouse wheel, the scrollbar in flash
and browser will both in effect.

The question is that how to disable the brower scrollbar when I scroll mouse
wheel inside the scrollPanel component. In fact, adobe already done this, if my
cursor inside a textfield object, the scrollbar of bowser will not get focus.
How to achieve this effect? My english is bad, but I need help!