Adobe Contribute can convert Microsoft Office documents, such as Word documents, PowerPoint presentations, and Excel spreadsheets, to PDF documents, and insert these documents in web pages or blog entry drafts.
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.
Adobe Contribute Contribute Publishing Server 
Ready to upgrade Adobe Contribute? What do I get upgrading to Adobe Contribute CS5, if I have an older version of Contribute, probably Contribute 3.11 / Contribute 4.0?
