Missing Method in ArticlesController

You are seeing this error because the action An_Examination_of_the_Lordship_Controversy.aspx is not defined in controller ArticlesController

Notice: this error is being rendered by the app/views/errors/missing_action.thtml view file, a user-customizable error page for handling invalid action dispatches.

Fatal: Create Method:

<?php
    class ArticlesController extends AppController
    {
        function An_Examination_of_the_Lordship_Controversy.aspx()
        {

        }
    }
?>

in file : app/controllers/articles_controller.php

Error: Unable to execute action An_Examination_of_the_Lordship_Controversy.aspx in ArticlesController