Again, details matter.
IF you used OS9 Drive Setup to format the new drive, it was taken care of automatically.
IF however, you used an OSX-running computer, you have to select "Install OS9 Drivers" at the initialization step.
So now… If you DID get the driver installed, the next question is: When you blessed the System, did you actually deposit the files at the "top" of the drive and THEN return them - two separate steps, one out and one back in. More than a few have just pulled the files out and then put them back without ever "letting go" of them.
ALSO… To bless the System on a different computer, you must drop them at the top of the drive being blessed. You cannot drop them on the desktop because it's a different computer.