Storing Your Web Page
Make sure that you store the file in the correct directory (<cachesys>/csp/user, where <cachesys> is your Caché installation directory; e.g. C:\InterSystems\Cache) Otherwise, Caché will not be able to find it.
Also, make sure that the file has a .csp extension. Some Web development tools have a tendency to automatically use .htm or .html. If your Web development tool is Notepad, be careful that it does not append a .txt extension to your file name.