Booting from CD fails

Hello all,

I have:
Sun4u Sun Blade 100 UltraSparc IIe 500Mhz
128 RAM, CDROM standard included on the machine.

I don't know what is exactly happening with a new RH 6.2 Sparc
instalation:

Booting from CDROM:

boot: expert
Uncompressing image ...
Loading initial ramdisk
\
Remapping the kernel ... done
Booting Linux



And that's it!!
The CDrom drive stops reading and the instalation can't continue..
however I don't get any error message..

Any Ideas?

Thank You very much for your help.