Center column height and overflow issues.

When I add styling to the center column it does not work. I need that column to be a maximum height of 528 px and I need the content to scroll within the box

http://www.3floyds.com/new/blog/

You can see that the layout is broken on the bottom right. I just simply need the content of the site to scroll within a 528px high box.

I have tried al sorts of code and currently have this in the center column style:

max-height: 528px;
overflow:auto;

Any help would be appreciated.