FreeBSD 8.0-RC3/amd64 cannot boot on VirtualBox

[Daichi GOTO]

FreeBSD 8.0-RC3/amd64 cannot boot on VirtualBox.
Boot will stop and consume 100% cpu power during boot sequence 
as displaying as follow:

  Trying to mount rott from ufs:/dev/md0
  warning: no time-of-day clock registered, system time will not be set accurately

checked environment:

  FreeBSD 9.0-CURRENT #44: Mon Nov 16 09:51:20 JST 2009  amd64
  Core2 Quad Q9550
  virtualbox-3.0.51.r22902_2
    cpu: Core2 Quad Q9550 1-core
    mem: 1024MB
    VT-x: enable
    nested paging: disable

Is there anyone can boot 8.0-RC3/amd64 on VirtualBox?

-- 
Daichi GOTO
CEO | ONGS Inc.
81-42-316-7945 | daichi at ongs.co.jp | http://www.ongs.co.jp
LinkedIn: http://linkedin.com/in/daichigoto