Formcheck with mootools

I’m using this for validation
Right now i’m trying to get it to validate the em,mail field in my contact form,
But nothings happening, do you know why?

Have you checked your error/javascript console?
This is what mine reports after I load the page:

Uncaught ReferenceError: Fx is not defined /js/formcheck/more.js:11

how do i see that console?

Oh, I see it now…
What does that mean?

Console access

[list][]Google Chrome - Page -> Developer Tools -> JavaScript Console (Ctrl-Shift-J)
]Mozilla Firefox - Tools -> Error Console (Ctrl-Shift-J)
[*]Internet Explorer - Tools -> Developer Tools (F12)[/list]