[CodeIgniter IIS 5.1 ERROR] The system cannot find the file specified.

[eluser]Unknown[/eluser]
Hello All,

I would like to use the CI to create an application, but I am however running into some strange error, perhaps anyone of you could help me?

Please note that the localserver is an IIS 5.1 server

When I point my browser to the following URL : http://localhost/mywebapp/ the CodeIgniter welcome message is displayed.

But when I create my own function inside the Welcome Controller and try to access the function with URL : http://localhost/mywebapp/index.php/welcome/login the following error is displayed.
"The system cannot find the file specified."

My Code:

config.php http://pastebin.com/fR9wa4pi
routes.php http://pastebin.com/dVQ2AjPq
Controller welcome.php http://pastebin.com/Qx5YqEqG

Thank you in advance.