Boot with Sata....

I am trying to boot with a Sata Disk, but I receive this message: No
bootable device.
I followed the instructions explained in the appendix of
QNX® 4.25 RTOS Fsys.atapi Block Driver Installation Notes: I installed a
basic QNX4 installation on an EIDE disk. I installed the Fsys.atapi
driver, I created a partition on the SATA drive, I mounted the new
partition in the filesystem, I copied the QNX4 OS installation to the
SATA, I updated and rebuild the .boot file in the SATA drive, I update the
BIOS to boot from the SATA drive… but when I tried to boot, I got the
message explained before. I thanks in advance for any help … Victor J