Yes/No form

I have a form in my flash site (http://www.snapyphoto.com) that connects to a PHP file (http://www.snapyphoto.com/php/mailform.php). Up until now I have used Input text boxes but I would like to use a Flash MX 2004 Radio button. event though I have linked the variables the same way as the input boxes I do not get teh YES / NO answer in the e-mail it sends me. Is this a flash problem or a PHP problem? Any help would be appreciated.