I found this on RangeRovers.net today. I had tried XP3 Compatibility Mode but got a message of "The portable document format is not running". Changing it to Windows 98/Windows ME got it working.

Right click on AcroRd32.exe in the Acrobat4\Reader folder. Select "Properties" and then "Compatibility". Under "Compatibility Mode" check the box for "Run this program in compatibility mode for:" and from the drop down menu select "Windows 98 / Windows Me". Apply/OK all selections.

Right click on RAVE.exe in the appropriate folder. Select "Properties" and then "Compatibility". Under "Compatibility Mode" check the box for "Run this program in compatibility mode for:" and from the drop down menu select "Windows 98 / Windows Me". Apply/OK selections.