node.js + redis + socket.io + should work but doesn't (express's prefix bug?)

gistfile1.js

io.configure(function() {
  
  io.set('authorization', function(handshakeData, callback) {

    if (handshakeData.headers.cookie) {

      req_cookie =  cookie.parse(decodeURIComponent(handshakeData.headers.cookie));

      req_session = parseSignedCookie(req_cookie['connect.sid'], SECRET);

      sessionStore.get(req_cookie['connect.sid'], function(err, session) {

        if (session) {
          
          req = {
            sessionStore: sessionStore,
            sessionID: handshakeData.sessionID
          };

          session = new express.session.Session(req, session);
          console.log(JSON.stringify(session));
          //handshakeData.session = new Session(handshakeData, session);
        }
        if (err || !session) {
          console.log(JSON.stringify(session));
          console.log(JSON.stringify(err));
          console.log( 'Error!!!');
          return callback(err, false);
        }
        else {
         
          handshakeData.session = new Session(data, session);
          return callback(null, true);
        }

      });
    } else {
      
      return callback('No cookie transmitted', false);
    }
  });
});