title: Knockout validation group undefined or unable to location errors in MVC
body: <p>I'm trying to work on knockout and unable to validate using knockout validation plugin.
  [EDIT: update fiddle] 
  sample fiddle: jsfiddle.net/EHDD8</p>
  
  <pre><code>           var CustVM = function () {
          var self = this;
          self.name = ko.observable().extend({ required: "Name is required" });
          self.contact = ko.observable();
          self.phone1 = ko.observable();
          self.email = ko.observable().extend({email: true});
          self.website = ko.observable().extend({required: "Website is required"});
  
          self.Errors = ko.validation.group(self);
  
           self.save = function () {
              if (self.isValid()) {
                  alert("no error");
              }
              else {
                  alert("error");
              }
              alert("save clicked ");
          };
  
          self.cancel = function() {
              alert("cancel clicked");
          };
      };
  
      ko.applyBindings(new CustVM());
  </code></pre>
  
  <p>isValid is true even though i have not entered any required elements.</p>