Ckfinder Incompatible with IIS / ASP.Net connectors

Hi,
I have tried different ways to make Ckfinder integration with ckeditor works , but it does not work.
Any time I browse it via IE 7 /8 I encounter error 200. (I also changed checkauthenication retrun value to true).
If I use Firefox (latest) I could access to page , but when I tried to upload sample file , the upload indicator works but at last it shows again error 200.
In Chrome, Nothing happens at all. you won't see een Error
I'm really confused.
Wiktor, Could you help me with it or it has some bugs.

Sincerely,
Robert