Boot stuck.A8n32SLI motherboard

[zamboo]

Hello all, my problem is:
I couldn't even boot with Zephyroth LEO DVD rev1(tried all bootflag combinations-x -v cpus=1 -legacy -s -f). I get stuck either at "Darwin Kernel Version 9.1.0: Fri Nov 16 14:50:43; made by ToH:xnu-1228.0.2~1/Build/obj/RELEASE_I386" or multiple lines of "SAM Multimedia error..." thing.
Please any helps appraciated very much?
My AMD spec:
Motherboard: ASUS A8N32-SLi
Chipset: nForce4 SLI
CPU: Amd Athlon 64 3200+
Ram: 512 MB DDR2 ram
Video: nVidia GeForce 6800 GT PCI-e
Hard drive: 120gb 7200RPM IDE Master (0,0)
DVD: NEC DVD writer 4551A Slave (0,1)
Hard drive: 160gb 7200RPM SATA
Onboard Sound: AC97
Ethernet: Realtek RT8139 Family PCI (built-in)