The self.test() doesn't get triggered inside http.createServer():

App.prototype.createServer = function(){
    var self = this;

    var s = http.createServer(function(req,res){

                self.test(); // THIS DOESN`T WORK.

                req.addListener('end',function(){
                    res.writeHead(200,{'Content-Type' : 'application/x-javascript'});

                    self.test(); // THIS DOESN`T WORK.
                });

            });

                 self.test(); // THIS WORKS.
    return s;
};
App.prototype.test = function() {
    console.log('test')
};

If i move it out of http.createServer() it works. Why is this? this is stored in self which should make it not lose context. What am i missing here? I can provide extra code and more functions (self.init, etc) if necessary.

UPDATE

Instance:

new App({
    port: 8000
});

Initialization:

function App(options){
    if (! (this instanceof arguments.callee)) {
        return new arguments.callee(arguments);
    }
    var self = this;
    self.settings = {
        port : options.port
    }
    self.init();
};
App.prototype.init = function() {
        var self = this;
        self.server = self.createServer();
        self.server.listen(self.settings.port);
};