Says "cd key not working" just after it asks me to select a language for installation

[quackers1226]

OK.  I decided to finally install pets.  well, I uninstall OFB and Seasons (didn't realize I didn't need to uninstall OFB til it was too late!) and now I am stuck.  the computer starts to install OFB and it gets as far as asking me for the language I want when Windows Vista tells me that the CD Key is not working and that it is closing the program and will notify me if there is a solution.  It has nothing to do with my product key, this is before I even get a chance to enter the numbers/letters in!  Any ideas.  It just won't work at all.  I HATE VISTA.