In some IIS 6 instalations you might receive an error 'ASP 0131'.
That's due to a security setting in IIS that doesn't allow to use a relative paths in include files.
There are two solutions for this problem.
- Using the Administrative tools you can change the setting as explained in MS KB Q332117
- If you don't have access or don't want to change that, then open the ckfinder/core/connector/asp/connector.asp file, go to line 51 (it might change in newer versions) and change
<! -- #INCLUDE file="../../../config.asp" -->
with
<! -- #INCLUDE VIRTUAL="/ckfinder/config.asp" -->
Please, note that if you have placed ckfinder under a different root folder you'll need to adjust the path in that line
Also, there's a space in the previous lines due to a security restriction in this server, the lines should start with <!-- with no extra space between ! and -