I can’t add my domain iitemirates.com in windows live account for creating email addresses

I have one domain iitemirates.com. When I added this domain in windows live account. I got an error message "This domain name can't be used because it contains a protected word or inappropriate language. Please contact support if you feel this is not the case." This domain is registered for my International Institute of Technology and I don't know what protected word or inappropriate language is used in this domain. Please help me to sort out this issue.