VirtualBox causes kernel panic

VirtualBox Version: 4.0.12_OSE r72916

uname -a: FreeBSD shuttle0.lan 9.0-BETA1 FreeBSD 9.0-BETA1 #1: Wed Aug
17 01:21:47 WEST 2011
netSys@shuttle0.lan:/usr/obj/usr/src/sys/GALILEO  amd64

The kernel panic is occurred when I start a virtual machine with boot
from CD/DVD burner/reader device.

With or without passthrough.

Kernel panic > http://pastie.org/private/0nxanttdmtc9zvtllg0rw

atapicam is loaded and hald is working.
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netSys------
http://www.byteandbit.info
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