Hellow world example for new-GetRoute gives 404

[BladeFireLight]

New-GetRoute -Path "/helloworld" -ScriptBlock {
param($request,$response);
$response.Send('Hello World');
}

and I get

Server Error in '/' Application.
The resource cannot be found.

         Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been

removed, had its name changed, or is temporarily unavailable.  Please review the following URL and make sure that
it is spelled correctly.

         Requested URL: /helloworld

[BladeFireLight]

Nevermind. I seem to have another .net web app running.