title: Checkbox doesn't get checked in knockout
body: <p>I have a checkbox and click event for checkbox for updating data. When I click on the checkbox the data is updating but the checkbox does not get not checked. </p>
  
  <p>This is my html code:</p>
  
  <pre><code>&lt;td&gt;
   &lt;input type="checkbox" data-bind="checked: status, disable: status, click: $root.UpdateStatus" /&gt;
  &lt;/td&gt;
  </code></pre>
  
  <p>This is my script:</p>
  
  <pre><code>self.UpdateStatus = function (tblUsers) {
      $.ajax({
          type: "POST",
          url: 'SinglePageApp.aspx/UpdateStatus',
          data: "{statusVal: 'true',goalId: " + tblUsers.goalId + "}",
          contentType: "application/json; charset=utf-8",
          success: function (result) {
              alert(result.d);
          },
          error: function (XMLHttpRequest, textStatus, errorThrown) {
              alert(textStatus);
              alert(errorThrown);
          }
      });
  };
  </code></pre>
  
  <p>I want my checkbox to get checked when it is clicked. And after that put updated data after checkbox clicked.</p>