unable to install xorg-dev
 

Hello
I have installed ubuntu 9.10. on virtual workstation 6.I tried command
apt-get install xorg-dev on terminal prompt.
I got following error :

Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
xorg-dev: Depends: libdmx-dev but it is not installable
Depends: libfontenc-dev but it is not installable
Depends: libfs-dev but it is not installable
Depends: libice-dev but it is not installable
Depends: libsm-dev but it is not installable
Depends: libx11-dev but it is not installable
Depends: libxau-dev but it is not installable
Depends: libxaw7-dev but it is not installable
Depends: libxcomposite-dev but it is not installable
Depends: libxcursor-dev but it is not installable
Depends: libxdamage-dev but it is not installable
Depends: libxdmcp-dev but it is not installable
Depends: libxevie-dev but it is not installable
Depends: libxext-dev but it is not installable
Depends: libxfixes-dev but it is not installable
Depends: libxfont-dev but it is not installable
Depends: libxft-dev but it is not installable
Depends: libxi-dev but it is not installable
Depends: libxinerama-dev but it is not installable
Depends: libxkbfile-dev but it is not installable
Depends: libxkbui-dev but it is not installable
Depends: libxmu-dev but it is not installable
Depends: libxmuu-dev but it is not installable
Depends: libxpm-dev but it is not installable
Depends: libxrandr-dev but it is not installable
Depends: libxrender-dev but it is not installable
Depends: libxres-dev but it is not installable
Depends: libxss-dev but it is not installable
Depends: libxt-dev but it is not installable
Depends: libxtrap-dev but it is not installable
Depends: libxtst-dev but it is not installable
Depends: libxv-dev but it is not installable
Depends: libxvmc-dev but it is not installable
Depends: libxxf86dga-dev but it is not installable
Depends: libxxf86misc-dev but it is not installable
Depends: libxxf86vm-dev but it is not installable
Depends: x11proto-bigreqs-dev but it is not installable
Depends: x11proto-composite-dev but it is not installable
Depends: x11proto-core-dev but it is not installable
Depends: x11proto-damage-dev but it is not installable
Depends: x11proto-dmx-dev but it is not installable
Depends: x11proto-evie-dev but it is not installable
Depends: x11proto-fixes-dev but it is not installable
Depends: x11proto-fontcache-dev but it is not installable
Depends: x11proto-fonts-dev but it is not installable
Depends: x11proto-gl-dev but it is not installable
Depends: x11proto-input-dev but it is not installable
Depends: x11proto-kb-dev but it is not installable
Depends: x11proto-randr-dev but it is not installable
Depends: x11proto-record-dev but it is not installable
Depends: x11proto-render-dev but it is not installable
Depends: x11proto-resource-dev but it is not installable
Depends: x11proto-scrnsaver-dev but it is not installable
Depends: x11proto-trap-dev but it is not installable
Depends: x11proto-video-dev but it is not installable
Depends: x11proto-xcmisc-dev but it is not installable
Depends: x11proto-xext-dev but it is not installable
Depends: x11proto-xf86bigfont-dev but it is not installable
Depends: x11proto-xf86dga-dev but it is not installable
Depends: x11proto-xf86dri-dev but it is not installable
Depends: x11proto-xf86misc-dev but it is not installable
Depends: x11proto-xf86vidmode-dev but it is not installable
Depends: x11proto-xinerama-dev but it is not installable
Depends: xserver-xorg-dev but it is not going to be installed
Depends: xtrans-dev but it is not installable
E: Broken packages
Plz tell me the solution.

Have you tried running apt-get update before trying to install xorg-dev?

have also after
sudo apt-get update
sudo apt-get upgrade

If you have synaptic installed, I'd recommend using it, and if the dependencies show up in the listing of files not installed, installing them manually if necessary. HTH