Error1722 installing version 3.9 to windows 2000 pro desktop PC: There is a problem with this Windows installer package. A program as part of the setup did not finish as expected. Contact your support personnel or package vendor. Action: TextTo SpeechEngine, location:\tv_enua.exe,com...

Version 3.9 installed OK on a new VISTA Laptop.  The error ocurrs on a Windows 2000 OS desktop. I also tried to install to another WIN2000 OS machine to see if either machine behaved differently. The Error 1722 occurred on both machines at the same point in the installation -- ie. when it was attempting do do something with the file tv_enua.exe

Any ideas how to proceed to a successful WIN2000 install for version 3.9 ??