Connexion graphique par ssh

bonjour

je souhaiterais depuis mon ordinateur domicile pouvoir me connecté a un serveur dedié chez ovh.com avec l'interface graphique. Je n'y connais rien en linux, et je ne veux pas acheter de license windows sur le serveur dedié.
Donc sur le serveur, j'ai installer ubuntu-deskop pret a l'emploi.
a domicile j'ai windows vista, j'ai installer le client putty et le logiciel Xmind comme vu sur le forum.

Mais que dois je faire maintenant....?

si je fais un sudo startx j'ai :

xauth:  error in locking authority file /home/admin/.Xauthority 
xauth:  error in locking authority file /home/admin/.Xauthority 
xauth:  error in locking authority file /home/admin/.Xauthority 
xauth:  error in locking authority file /home/admin/.Xauthority 

X: warning; process set to priority -1 instead of requested priority 0 

This is a pre-release version of the X server from The X.Org Foundation. 
It is not supported in any way. 
Bugs may be filed in the bugzilla at https://bugs.freedesktop.org/ 
Select the "xorg" product for bugs you find in this release. 
Before reporting bugs in pre-release versions please check the 
latest version in the X.Org Foundation git repository. 
See https://www.x.org/wiki/GitPage/ for git access instructions. 

X.Org X Server 1.4.0.90 
Release Date: 5 September 2007 
X Protocol Version 11, Revision 0 
Build Operating System: Linux Ubuntu (xorg-server 2:1.4.1~git20080131-1ubuntu9) 
Current Operating System: Linux christophe.l.ovh.net 2.6.31.5-xxxx-std-ipv4-32 #3 SMP Tue Nov 24 16:54:54 UTC 2009 i686 
Build Date: 15 April 2008  05:26:17PM 

        Before reporting problems, check https://www.x.org/wiki/ 
        to make sure that you have the latest version. 
Module Loader present 
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 Mar 23 13:01:03 2010 
(==) Using config file: "/etc/X11/xorg.conf" 
(II) Module "i2c" already built-in 
(II) Module "ddc" already built-in 
(II) Module "ramdac" already built-in 
FATAL: Could not load /lib/modules/2.6.31.5-xxxx-std-ipv4-32/modules.dep: No such file or directory 
(EE) [drm] drmOpen failed. 
(EE) CHROME(0): [dri] DRIScreenInit failed.  Disabling DRI. 
Freed 1920000 (pool 1) 
expected keysym, got XF86KbdLightOnOff: line 70 of pc 
expected keysym, got XF86KbdBrightnessDown: line 71 of pc 
expected keysym, got XF86KbdBrightnessUp: line 72 of pc 
expected keysym, got XF86KbdLightOnOff: line 70 of pc 
expected keysym, got XF86KbdBrightnessDown: line 71 of pc 
expected keysym, got XF86KbdBrightnessUp: line 72 of pc 
The XKEYBOARD keymap compiler (xkbcomp) reports: 
> Warning:          Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols 
>                   Ignoring extra symbols 
Errors from xkbcomp are not fatal to the X server 

merci