Defaulting to ASP

Well, 2.5b did not solve this for me: for some reason the filebrowser is using ASP while I have it set to PHP.

I followed the instructions from the wiki.
My fckconfig.js reads:
var _FileBrowserLanguage = 'php'
var _QuickUploadLanguage = 'php' ;
I set the apropriate path in filemanager/browser/default/connectors/php/config.php and in filemanager/upload/...

Then I tried an upgrade to 2.5b, in which it should already default to PHP.

In either case, when I open an editor instance, click on the image button, click "browse server", I get the browser screen plus a huge alert() type notification saying

"The server didn't send back a proper XMLresponse.

Requested URL: [...]fckeditor/editor/filemanager/bowser/default/connectors/asp/connector.asp?Command=GetFoldersAndFiles&[...]
Response text:
[ASP File Manager Connector source code]"

Any idea what I'm doing wrong?