How do my server xorg in a VM based on Ubuntu Studio?

# /etc/X11/xorg.conf (xorg X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf(5) manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
# sudo dpkg-reconfigure -phigh xserver-xorg

Section "Files"
 FontPath "/usr/share/fonts/X11/misc"
 FontPath "/usr/share/fonts/X11/cyrillic"
 FontPath "/usr/share/fonts/X11/100dpi/:unscaled"
 FontPath "/usr/share/fonts/X11/75dpi/:unscaled"
 FontPath "/usr/share/fonts/X11/Type1"
 FontPath "/usr/share/fonts/X11/100dpi"
 FontPath "/usr/share/fonts/X11/75dpi"
 # path to defoma fonts
 FontPath "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
EndSection

Section "Module"
 Load "i2c"
 Load "bitmap"
 Load "ddc"
 Load "dri"
 Load "extmod"
 Load "freetype"
 Load "glx"
 Load "int10"
 Load "vbe"
EndSection

Section "InputDevice"
 Identifier "Generic Keyboard"
 Driver "kbd"
 Option "CoreKeyboard"
 Option "XkbRules" "xorg"
 Option "XkbModel" "pc105"
 Option "XkbLayout" "fr"
 Option "XkbVariant" "oss"
EndSection

Section "InputDevice"
 Identifier "Configured Mouse"
    Driver "vboxmouse"
    Option "CorePointer"
 Option "Device" "/dev/input/mice"
 Option "Protocol" "ImPS/2"
 Option "ZAxisMapping" "4 5"
 Option "Emulate3Buttons" "true"
EndSection

Section "InputDevice"
 Driver "wacom"
 Identifier "stylus"
 Option "Device" "/dev/input/wacom"
 Option "Type" "stylus"
 Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Section "InputDevice"
 Driver "wacom"
 Identifier "eraser"
 Option "Device" "/dev/input/wacom"
 Option "Type" "eraser"
 Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Section "InputDevice"
 Driver "wacom"
 Identifier "cursor"
 Option "Device" "/dev/input/wacom"
 Option "Type" "cursor"
 Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Section "Device"
 Identifier "Generic Video Card"
    Driver "vboxvideo"
 BusID "PCI:0:2:0"
EndSection

Section "Monitor"
 Identifier "Generic Monitor"
 Option "DPMS"
 HorizSync 28-51
 VertRefresh 43-60
EndSection

Section "Screen"
 Identifier "Default Screen"
 Device "Generic Video Card"
 Monitor "Generic Monitor"
 DefaultDepth 24
 SubSection "Display"
  Depth 1
  Modes "1024x768" "800x600" "640x480"
 EndSubSection
 SubSection "Display"
  Depth 4
  Modes "1024x768" "800x600" "640x480"
 EndSubSection
 SubSection "Display"
  Depth 8
  Modes "1024x768" "800x600" "640x480"
 EndSubSection
 SubSection "Display"
  Depth 15
  Modes "1024x768" "800x600" "640x480"
 EndSubSection
 SubSection "Display"
  Depth 16
  Modes "1024x768" "800x600" "640x480"
 EndSubSection
 SubSection "Display"
  Depth 24
  Modes "1024x768" "800x600" "640x480"
 EndSubSection
EndSection

Section "ServerLayout"
 Identifier "Default Layout"
 Screen "Default Screen"
 InputDevice "Generic Keyboard"
 InputDevice "Configured Mouse"
EndSection

Section "DRI"
 Mode 0666
EndSection

X.Org X Server 1.6.0
Release Date: 2009-2-25
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.24-23-server i686 Ubuntu
Current Operating System: Linux ubuntu 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:57:59 UTC 2009 i686
Build Date: 09 April 2009 02:10:02AM
xorg-server 2:1.6.0-0ubuntu14 (<email address hidden>)
 Before reporting problems, check http://wiki.x.org
 to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
 (++) from command line, (!!) notice, (II) informational,
 (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Tue Apr 28 12:44:25 2009
(==) Using config file: "/etc/X11/xorg.conf"
(==) No Layout section. Using the first Screen section.
(**) |-->Screen "Default Screen" (0)
(**) | |-->Monitor "Configured Monitor"
(**) | |-->Device "Configured Video Device"
(==) Automatically adding devices
(==) Automatically enabling devices
(WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
 Entry deleted from font path.
(==) FontPath set to:
 /usr/share/fonts/X11/misc,
 /usr/share/fonts/X11/100dpi/:unscaled,
 /usr/share/fonts/X11/75dpi/:unscaled,
 /usr/share/fonts/X11/Type1,
 /usr/share/fonts/X11/100dpi,
 /usr/share/fonts/X11/75dpi,
 /var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType,
 built-ins
(==) ModulePath set to "/usr/lib/xorg/modules"
(II) Cannot locate a core pointer device.
(II) Cannot locate a core keyboard device.
(II) The server relies on HAL to provide the list of input devices.
 If no devices become available, reconfigure HAL or disable AllowEmptyInput.
(II) Loader magic: 0x3bc0
(II) Module ABI versions:
 X.Org ANSI C Emulation: 0.4
 X.Org Video Driver: 5.0
 X.Org XInput driver : 4.0
 X.Org Server Extension : 2.0
(II) Loader running on linux
(++) using VT number 7

(--) PCI:*(0@0:2:0) InnoTek Systemberatung GmbH VirtualBox Graphics Adapter rev 0, Mem @ 0xe0000000/134217728
(II) Open ACPI successful (/var/run/acpid.socket)
(II) System resource ranges:
 [0] -1 0 0xffffffff - 0xffffffff (0x1) MX[B]
 [1] -1 0 0x000f0000 - 0x000fffff (0x10000) MX[B]
 [2] -1 0 0x000c0000 - 0x000effff (0x30000) MX[B]
 [3] -1 0 0x00000000 - 0x0009ffff (0xa0000) MX[B]
 [4] -1 0 0x0000ffff - 0x0000ffff (0x1) IX[B]
 [5] -1 0 0x00000000 - 0x00000000 (0x1) IX[B]
(II) LoadModule: "extmod"
(II) Loading /usr/lib/xorg/modules/extensions//libextmod.so
(II) Module extmod: vendor="X.Org Foundation"
 compiled for 1.6.0, module version = 1.0.0
 Module class: X.Org Server Extension
 ABI class: X.Org Server Extension, version 2.0
(II) Loading extension MIT-SCREEN-SAVER
(II) Loading extension XFree86-VidModeExtension
(II) Loading extension XFree86-DGA
(II) Loading extension DPMS
(II) Loading extension XVideo
(II) Loading extension XVideo-MotionCompensation
(II) Loading extension X-Resource
(II) LoadModule: "dbe"
(II) Loading /usr/lib/xorg/modules/extensions//libdbe.so
(II) Module dbe: vendor="X.Org Foundation"
 compiled for 1.6.0, module version = 1.0.0
 Module class: X.Org Server Extension
 ABI class: X.Org Server Extension, version 2.0
(II) Loading extension DOUBLE-BUFFER
(II) LoadModule: "glx"
(II) Loading /usr/lib/xorg/modules/extensions//libglx.so
(II) Module glx: vendor="X.Org Foundation"
 compiled for 1.6.0, module version = 1.0.0
 ABI class: X.Org Server Extension, version 2.0
(==) AIGLX enabled
(II) Loading extension GLX
(II) LoadModule: "record"
(II) Loading /usr/lib/xorg/modules/extensions//librecord.so
(II) Module record: vendor="X.Org Foundation"
 compiled for 1.6.0, module version = 1.13.0
 Module class: X.Org Server Extension
 ABI class: X.Org Server Extension, version 2.0
(II) Loading extension RECORD
(II) LoadModule: "dri"
(II) Loading /usr/lib/xorg/modules/extensions//libdri.so
(II) Module dri: vendor="X.Org Foundation"
 compiled for 1.6.0, module version = 1.0.0
 ABI class: X.Org Server Extension, version 2.0
(II) Loading extension XFree86-DRI
(II) LoadModule: "dri2"
(II) Loading /usr/lib/xorg/modules/extensions//libdri2.so
(II) Module dri2: vendor="X.Org Foundation"
 compiled for 1.6.0, module version = 1.0.0
 ABI class: X.Org Server Extension, version 2.0
(II) Loading extension DRI2
(II) Scanning /usr/share/xserver-xorg/pci directory for additional PCI ID's supported by the drivers
(II) Matched vboxvideo from file name vboxvideo.ids
(==) Matched vboxvideo for the autoconfigured driver
(==) Assigned the driver to the xf86ConfigLayout
(II) LoadModule: "vboxvideo"
(WW) Warning, couldn't open module vboxvideo
(II) UnloadModule: "vboxvideo"
(EE) Failed to load module "vboxvideo" (module does not exist, 0)
(EE) No drivers available.

Fatal server error:
no screens found

Please consult the The X.Org Foundation support
  at http://wiki.x.org
 for help.
Please also check the log file at "/var/log/Xorg.0.log" for additional information.

 ddxSigGiveUp: Closing log

I have fix the issue myself. I update Virtualbox 2.1.4 to 2.2.2 which support Xorg > 1.6 version and after reinstalling Virtualbox Additions all was working fine!