FC2 x86_64 doesnt boot with SMP kernel using 4 Opterons

["Axel Jerabek" <axel gapfilms de>]

FC2 x86_64 doesnt boot with SMP kernel using 4 Opterons
on a Tyan Transport TX46 (Mainboard: K8QS Pro)

The UP-kernel boots just fine.
Also downloaded the updates.
The latest kernel precompiled was 2.6.8-1.521

When i try to boot the system with the SMP-kernel
it just shows me the first line: loading the kernel...
Then it reboots/resets back to bios.

Also tried acpi=off as a kernel option.
Doesnt help. Is there anyone with the same problem and maybe fixed it?
Is this a known problem?

Thnx for any help.

Axel