IE 9 and JQuery - IE9 only displays first character

Question

I have the jQuery below on my pages and they work fine in Chrome but when I view in IE9 i only get the first character displayed. What am I missing?

$(".alpha").inputmask('Regex', { regex: "[a-zA-Z ]+" }); // Limits entry to letters and space character
$(".name").inputmask('Regex', { regex: "[a-zA-Z-`' ]+" }); // Limits entry to letters, -, `, ' and space character 
$(".alphanumeric").inputmask('Regex', { regex: "[a-zA-Z0-9 ]+" }); // Limits entry to letters, numbers and space character