socket.io not emitting to and fro server and client

I have made an app with nodejs and with socket.io which echos messages to and fro from the client to the server... Here's a tiny bit of my server code:

io.on('connection', function(socket){
                    socket.on('sentmsg', function(msg){
                            io.emit('sentmsg', msg);
                    });
                });

And here's my code on the client side :

var socket = io();
    $('form').submit(function(){
        socket.emit('sentmsg', $('#m').val());
        $('#m').val('');
        return false;
    });
    socket.on('sentmsg', function(data){
        $('#boxf').append($('<li>').text(data));
        alert(data);

    });

It should append to the element in my html code but it is changing into a url followed by a query string like ?msg="the msg I entered"

Please help

Thanks in advance