CKSource not opening correctly.

This is a strange error. On one of the web sites when I use CKSource for uploading images everything works fine. However another person instead of the actual window with image thumbnails and tools for uploading sees the sites' error page (The page does not exist).

So the problem is not general (everyone is experiencing the error) but specific. First few guesses were problems with AntiVirus or Browser, but for this person the problem occurs on different browsers, even different computers and with different Anti Virus installed.

So may question is. What could prevent proper loading of CKSource in PHP environment and is experienced only by one user.

Any help would be greatly appreciated.

Andrew

I am using Version 2.0.1