My form users are getting an error page after they submit the form

Xcite Media Group

subaccount: Maids (3 total forms)

Their customers are getting an error message when they fill out and complete web submissions on IE. The forms are getting to them, but their client doesn't think they are. Can we look into that?

http://themaidsdenver.com/free-quote/  

http://themaidsdenver.com/contact-us/