boot problem on sun blade 100

[Sharma, Kulbhushan]

hi
 
I am trying to install Solaris 8 on Sun Blade 100.I am using local CDROM to
boot the system.When i am typing "ok boot cdrom" I am getting the error
message 
"boot:cannot open /kernel/Sparcv9/unix".
 
How can I reset the boot file in PROM to " " blank instead of
/kernel/Sparcv9/unix.
 
Pl. give some suggestions
 
KB
kbs at estee.com <mailto:kbs at estee.com>