Site not functioning in IE?

I need some help!

I built this site about a year ago for a photographer. I am on a Mac, and she just recently started complaining that the site doesnt work on her PC. She says that after the home page, and page that she goes to gives her an error message? I dont have a PC to look at. Could it be something with IE7 and my Flash detection script? Any help would be GREATLY appreciated.