laravel 5.1 changing host name "NotFoundHttpException"

I just wondering why my laravel application will not work if I will change my host name ex:mynewapp.dev the error will thrown "NotFoundHttpException", but If I put it back the original host name ex: app.org , it works fine I am using homestead, I edited the homestead.yaml and my host file. I also clear the application cache.but still I cannot make it work with my new host name.

Thank you in advance.

via Chebli Mohamed