[jQuery] [validate] need help with addMethod

[Priest, James (NIH/NIEHS) [C]]

Trying to add a new validation method to check a yes/no set of radio
buttons:

My method:

        $.validator.addMethod("checkyesno", function(value) {
            if (value == 'Yes') {
                return true;
            } else {
               return false;
            }
    },
    "You must read and agree to the terms and conditions before
proceeding.");

My rules:

        rules: {
                terms: {required: true, checkyesno: true}
                },


But so far have not been able to make this work... What am I doing
wrong?? 

Thanks!
Jim