fixed div inside relative - control

[vitamineg]

Hello,

probably a 101 question but here it is...thanks in advance!

I have a page that has a form inside a fixed position div. (the sidebar on this particular page)

Problem is that as a person scrolls down the page, the form follows as appropriate but falls through the bottom of the parent, relative div.

As you can see, i put a border on the parent div (for your clarity) and assigned it a height value which i THOUGHT would prevent the form div from going any lower than intended.

How can i prevent the form from falling thru the bottom of the parent div yet remain fixed as you scroll down?

Thoughts?

the example page is : http://magicalunderground.com/rejection-protection/rejection-protection-seminar-may-third-2012/