Can’t install 14.1.0 update on my Mac Lion, 10.7.5.

   I can't install 14.1.0 update package on my Mac Lion, the version is 10.7.5, My Office for Mac 2011 version is 14.0.0, it always tell me: "Office 2011 14.1.0 Update can't be installed on this disk. A version of  software required to install this update was not found on this volume." I read the threads about installing update package failed and reinstall Office follow: http://www.office.mvps.org/install/reinstall_office2011.html, but, I can't install update package still.

  Any suggestions?

  Thanks a lot!