Enables display of an AJAX driven contact form when a user clicks on links with a specified class.
Could be one of a few things. First, check the version of the plugin you're using. If it's lower than 0.4, upgrade and it should resolve the issue. If that doesn't do it, change the default email address from my address to your own... It'll make my inbox lighter, too. Finally, you may be having an issue with mail in general. Contact your server admin for help.