Family tree cannot be opened

Hi,
I installed Family Tree Maker on Mac OS X 10.5.8 and the installation was successful or at least I thought so. After the installation, on double clicking the program to launch it, I ran into the error below. I ran the program several times but still couldn’t get through to it. What do I do?

Error: You can’t open the application “Run Syntax Tests” because it is not supported on this architecture.
