CSS Question

[Lopton]

Hi all,
I was playing around and customizing my Zen Cart, doing fine and getting everything the way I want it. Of course I waited until I was almost done to check my website in Internet Explorer instead of Firefox, and argg I can't figure out how to do what I want now.

In firefox this page http://www.mattemerson.com/Gallery/i...&products_id=1 displays perfectly. But in IE7 the add to cart box border goes off the right side of the page and I can't figure out how to make it not do that. I tried running the page through the The W3C CSS Validation Service and it passes... so what do I have to do to get the border around the add this to my cart button to show up properly?

Thank you for your help!

-=Matt=-