factory on cube

As Peter suggested I post here a PPC question.I have a cube Apple g4, where I can t start installation.It starts till probing hardware, but when tries modprobing sbp2 gives to me a Uncoverable machine check, kernel panic. It s not a hardware issues ,Tiger is fine on the machine, recently I booted from 10.0 suseboot and it s fine too.This issues appeared since beta version of 10.1. Somebody has a suggestion how to working out?