Problems with xorg.conf

Hi folks,

I'm using a virtual machine to run Ubuntu 9.04 and I tried modify the xorg.conf following the steps by other pages and I always have problems when I restart the vmachine (Sun VirtualBox).

This is my xorg.conf
------------------------------------------------------------------------------------------------
#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 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.
#
# Note that some configuration settings that could be done previously
# in this file, now are automatically configured by the server and settings
# here are ignored.
#
# 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 "Device"
Identifier "Configured Video Device"
EndSection

Section "Monitor"
Identifier "Configured Monitor"
EndSection

Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
EndSection

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So what I really gotta add here (I want 1350 x 750 of resolution)? cause I don't want get problems of resolution any more.

Thank you sooo much!

PD: please don't look at me like a stupid or newbie, just I'm beginning :wink: