Getting Error POST http://localhost:8080/stub/cms/myalerts2.json 405 (Method Not Allowed)

I am running my application with grunt task runner, it throws me following error:

POST http://localhost:8080/stub/cms/myalerts2.json 405 (Method Not Allowed)

I have tried following things in my Gruntfile.js

 connect: { 
                server: { 
                    options: { 
                        keepalive: true, 
                        port: 8001, 
                        protocol: 'http', 
                        hostname: '*', 
                        base: 'dis', 
                        directory: 'dis', 
                        open: { 
                            target: 'http://localhost:8001/mydemo.html', 
                            appname: 'open' 
                        },

                        middleware: function(connect, options, middlewares) {
                    middlewares.unshift(function(req,res,next){
                            res.setHeader('Access-Control-Allow-Origin', req.headers.origin);
                            res.setHeader('Access-Control-Allow-Credentials', true);
                            res.setHeader('Access-Control-Allow-Methods', 'GET,HEAD,PUT,POST,DELETE');
                            res.setHeader('Access-Control-Allow-Headers', req.headers['access-control-request-headers']);
                        });
                        return middlewares;
                }   
} 
        } 
    },

Still its not allowing me to run. Any help or suggestion will me most welcome. Thanks in advance

After couple of irritating days finally my code works for me. Look into my code below:-

connect: { 
            server: { 
                options: { 
                    keepalive: true, 
                    port: 8001, 
                    protocol: 'http', 
                    hostname: '*', 
                    directory: 'dist', 
                    open: { 
                        target: 'http://localhost:8001/myDemo.html', 

                    },
                        middleware: function(connect, options, middlewares) {

                                middlewares.unshift(function(req, res, next) {
                                    res.setHeader('Access-Control-Allow-Credentials', true);
                                    res.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
                                    res.setHeader('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,OPTIONS');
                                    **if (req.method.toUpperCase() == 'POST') req.method='GET';**
                                    return next();
                                });

                                return middlewares;
                        }

                } 
            } 
        },

see the star marked line ie if (req.method.toUpperCase() == 'POST') req.method='GET'; i done this trick and its worked for me. This aricle also helps to me https://github.com/gruntjs/grunt-contrib-connect#middleware