using the filebrowser with php

I've got some problems with getting the filebrowser to work in php.
All I do to use FCKedito is put this line in the header:

<script type="text/javascript" src="/1/lib/fckeditor/fckeditor.js"></script>

and this at the bottom of my page:

<script type="text/javascript">
var sBasePath = '/1/lib/fckeditor/';
var oFCKeditor = new FCKeditor( 'doc_text' ) ;
oFCKeditor.BasePath = sBasePath ;
oFCKeditor.Height = 100 ;
oFCKeditor.Width = 900 ;
oFCKeditor.ReplaceTextarea() ;
</script>

pretty simple, all it has to do is replace the text field doc_text with the editor. That works fine, but I run into trouble when I want to insert a image.
As soon as I open the file browser I get "The server didn't send back a proper XML response"
The problem is right in the next line, because it shows that the requisted line is /fckeditor/editor/filemanager/browser/default/connectors/asp/.....

The problem is that I use PHP, not ASP. To resolve the problem I alttered these two lines in my fckconfig.js:

var _FileBrowserLanguage = 'php' ;
var _FileBrowserExtension = 'php';

That didn't help, actually, nothing I altered in that file did anything, I could even delete it, and the editor was still working the same way.

After that I tried to do it this way, I added this line to my php file:

oFCKeditor.Config["CustomConfigurationsPath"] = "/1/lib/fckeditor/myconfig.js" ;

in myconfig.js I placed the two lines I mentioned above, but one again, no luck.

After that I tried just to place these two lines in my php file:

oFCKeditor.FileBrowserLanguage = 'php' ;
oFCKeditor.FileBrowserExtension = 'php';

But that didn't do anything either. I still see that it's trying to reach that asp connector.

Any ideas how to solve this problem?