IE Issue, my Site blew up in IE Help

Hi I'm not sure what I've done, I havne't touched hte IE.css file in my theme but all of a sudden my site is left aligned only in IE, in Safari and Chrome it looks great. The changes I did make today installed 2 plugins: Magazine Columns Redirection   Both of which I deactivate and deleted. I'm not sure what the problem is. Someone please help me. !!!!!!!! The URL for the site is prophixuserconference.com