Dear Support, We are using zope with windows NT/IIS 4.0. I did all changes according to your online help. But while accessing the zope through zope. I am getting authentication problems. Here I am pasting the error message. Please help us resolving the situation ============ERROR MESSAGE================= HTTP Error 401 401.5 Unauthorized: Authorization failed by ISAPI/CGI app This error indicates that the address on the Web server you attemped to use has an ISAPI or CGI program installed that verifies user credentials before proceeding. The authentication used to connect to the server was denied access by this program. Please make a note of the entire address you were trying to access and then contact the Web server's administrator to verify that you have permission to access the requested resource. ============ERROR MESSAGE================= best regards prasanthnag __________________________________________________ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail http://personal.mail.yahoo.com/