Auto open docx and xlsx files in MS Office 2011 after it download in Safari (com.apple.DownloadAssessment.plist not work)

Question

Check "Open safe files" in Safari and define docx and xlsx extensions in ~/Library/Preferences/com.apple.DownloadAssessment.plist not work. Old doc and xls files was auto opened successfully...
Content of .plist file:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
          <key>LSRiskCategorySafe</key>
          <dict>
                    <key>LSRiskCategoryExtensions</key>
                    <array>
                              <string>doc</string>
                              <string>docx</string>
                              <string>xls</string>
                              <string>xlsx</string>
                              <string>ppt</string>
                              <string>pptx</string>
                    </array>
          </dict>
</dict>
</plist>

Answer 1

Yes, but there at least you are talking to people who all use the app, while in this forum (which is for hardware and not software in any case, so already off the mark, since the problem has nothing to do with hardware), it is probably a minority.
A better place would be
https://discussions.apple.com/community/mac_os/os_x_mountain_lion
and or
https://discussions.apple.com/community/mac_os/safari
I did see someone from serveral years ago with the same problem at
http://www.neowin.net/forum/topic/877358-open-microsoft-office-files-automatical ly-after-download-in-safari/
I wonder if there is another list somewhere of permissible extensions in that .plist....