Unable to install PAX Agent on iMac running OSX 10.8.4

Downloaded the Parallels Access Agent and opened the .DMG file. I get the INSTALL window, but clicking it doesn't do anything. Running latest iMac with OS X 10.8.4.

 

Hi unixman,

Please re-download and install by following the steps as suggested at http://kb.parallels.com/116770

Thanks,
Abdul