Fix Wordpress Theme CSS for Internet Explorer

Hi, I am using a Wordpress theme: [login to view URL] But my website isn't displayed properly in Internet Explorer, even though it should. It is a very easy fix for someone who knows what's wrong, but unfortunately I can't figure it out myself. Reply with "CSSWP" so I know you have read the brief, and don't send a long message explaining your company, and what you can do and bla bla bla. Bid accordingly, this is a WP theme for $35 so obviously I am not willing to pay alot having this small error fixed.