error 404 ??

Hi!
congratz for a nice WYSIWYG Editor !!

But there is a (simple ??) Question:
When installing the editor on my server and calling
FCKeditor/_test/test.php always when the editor should appear theres a error 404 /

I set the includepath to absolutepath, but error happens again.

donno where to set the paths, that the script works /

would be glad if you can help