Old game, new computer = FAIL

My desktop computer is not working at the moment, so my daughter asked me to install Scholastic Brain Play grade 1-3 (no link available) on my laptop.  When I click on Autorun, I get the following message:

The version of this file is not compatible with the version of Windows you’re running.  Check your computer’s system information to see whether you need an x86 (32-bit) or x64 (64-bit) version of the program, and then contact the software publisher

Now, I’m not an expert on Windows, but as far as I knew, 32-bit apps were supposed to run on Vista 64 (hence the Program Files (x86) directory)