Earlier versions of Adobe Contribute would work fine with WS_FTP server for most of the protocols but for SFTP. When you make connection to the WS_FTP server through SFTP protocol, you can’t publish any page, you are thrown an error message “An error occurred. Please contact your Administrator”. This issue is resolved in Adobe Contribute CS5 version. With this fix Contribute works seamlessly with WS_FTP server in SFTP configuration.