Hello,
Thank you everybody for the help! Everything works fine now
Here's what I did to make everything work:
1. I changed the Mac OS ROM 10.2.1 with Macintosh ROM 10.2.1v1 "Generic", you can find it here (with an extension called Insomnia):
https://www.thinkclassic.org/viewtopic.php?pid=4504#p45042. I replaced the "Apple CPU Plugins" extension with the one you told me to download.
The only thing that is not working properly is my ATI Radeon 9600 Pro because there is no driver for Mac OS 9
It works but the possibilities that you have with that card on Mac OS X are very limited when you are on Mac OS 9.
Have anyone information to operate the ATI Radeon 9600 Pro correctly with Mac OS 9?
I tried to replace the 9600 Pro by a NVIDIA Ge Force 4600 Ti and everything's fine with that graphic card.
So again, thank you to everyone for your help
Next step, I will try to install Pro Tools 5.1.3 TDM with the Digidesign expansion chassis 13 slots with inside 1 Mix Core, 6 Mix Farms and 3 DSP Farms
I will keep you informed but that's for later because I have a lot of work for the moment