Problem with integrating FCKeditor to a PHP page

Hi guys:

I have a question on how to integrate the FCKeditor to my PHP page.

I downloaded the latest release and integrated it to my PHP page inside a form. While doing this, I followed the instruction very closely. I think their instruction is straightforward and simple but I have a feeling that the FCKeditor development team missed something in their instruction. Anyway, this is the error message I received:

Not Found
The requested URL /fckeditor/editor/fckeditor.html was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

Any ideas ? Thanks a lot!