Re: acrobat 9 Pro

Who knows? There's probably some conflict or corruption somewhere.

Try running the Cleaner

http://labs.adobe.com/downloads/acrobatcleaner.html

Then reinstall from disc.

Or try the Acrobat 9 Pro Trial version download then enter your serial number to convert to a full version

http://prodesigntools.com/all-adobe-cs5-direct-download-links.html

Ensure that you follow the Very Important Instructions first otherwise the links will not work.