Problems with websocket_messaging

[Ali Mhrez]

I followed the video of Mr Bruno Rocha to implement simple websocket, the controller is very simple:

@auth.requires_login()

def index():

    form = SQLFORM(Post, formstyle='divs')

    if form.process().accepted:

        websocket_send('http://127.0.0.1:8888', 'hello', 'mykey', 'mygroup')

        pass

    messages = db(Post).select(orderby=~Post.created_on)

    return dict(form=form, messages=messages)

and in the view:

<script>

   $(document).ready(function(){

      if(!$.web2py.web2py_websocket('ws://127.0.0.1:8888/realtime/mygroup', function(e){alert(e.data)}))

         alert("html5 websocket not supported by your browser, try Google Chrome");

   });

   </script>

but when i open the view the server prints exceptions showed in the error_log file.

Any Help Please??