Please find the images that i have uploaded.

or
http://img25.imageshack.us/gal.php?g=element1m.jpg
First image has Scan Options label which has checked boxes which i need to select
Second image i scrolled down to get that checked boxes with mouse wheel move or scroll bar down
How can i make this as automated so that user scrolls down until get that element and then check the element.
When i try to see with Ensure Visible its true.
Can you let me know how??