port-macppc: Can't install 1.6 on Powerbook2400c

Subject: Can't install 1.6 on Powerbook2400c
To: port-macppc@netbsd.org <port-macppc@netbsd.org>
From: Aki <imac@mbr.sphere.ne.jp>
List: port-macppc
Date: 11/04/2002 11:17:12

I downloaded 1.6 iso-image file and burn it to CD-R(use 
DiscCopy(MacOSX10.2)).
Then I start up Powerbook2400c Openfirm mode and input command as below
0> boot scsi/sd@6:0
But CD-ROMDrive only spin.not read any file.

Help me.