Can't Install FileMaker 8.5 on Mac iBook G4?

[Rank Beginner]

Received software for FileMaker v. 8.5 today, but can't get it installed on my laptop (Mac iBook G4, OS X v. 10.4). I put the disc in, click on the installer icon, and get an error message reading:

"The software to be installed requires a minimum of Mac OS X v.10.3.9 or Mac OS X v.10.4.5."

It installed on my G5 desktop machine (running OS X 10.4.9) just fine. I really need it on the laptop, too.

Anyone got any ideas?

Thanks!

[Ender]

Update your iBook's OS to 10.4.5 or later.