Problem installing Adobe Shockwave to my OSX 10.6 Snow Leopard

I can’t install Adobe Shockwave Player to my OSX 10.6 Snow Leopard. Aren’t they compatible with each other? I have tried reinstalling it but it still failed. There must be something wrong with the Shockwave installer or its compatibility version for Mac Book. Please help me find ways to fix it. I need to take Brain Fitness test as soon as possible.

The installation failed.
The installer encountered an error that caused the
installation to fail. Contact the software manufacturer
for assistance.
