Message de démarrage Minecraft

Bonjour,
je voudrais lancer Minecraft pour pouvoir y jouer, mais dés que je me connecte, ça me met ça:

Bad video card drivers!
-----------------------

Minecraft was unable to start because it failed to find an accelerated OpenGL mode.
This can usually be fixed by updating the video card drivers.

--- BEGIN ERROR REPORT 7fe0271 --------
Generated 06/02/11 21:15

Minecraft: Minecraft Beta 1.2_02
OS: Windows 7 (x86) version 6.1
Java: 1.6.0_23, Sun Microsystems Inc.
VM: Java HotSpot(TM) Client VM (mixed mode), Sun Microsystems Inc.
LWJGL: 2.4.2
[failed to get system properties (java.lang.NullPointerException)]

org.lwjgl.LWJGLException: Pixel format not accelerated
at org.lwjgl.opengl.WindowsPeerInfo.nChoosePixelFormat(Native Method)
at org.lwjgl.opengl.WindowsPeerInfo.choosePixelFormat(WindowsPeerInfo.java:52)
at org.lwjgl.opengl.WindowsDisplay.createWindow(WindowsDisplay.java:185)
at org.lwjgl.opengl.Display.createWindow(Display.java:311)
at org.lwjgl.opengl.Display.create(Display.java:856)
at org.lwjgl.opengl.Display.create(Display.java:784)
at org.lwjgl.opengl.Display.create(Display.java:765)
at net.minecraft.client.Minecraft.a(SourceFile:243)
at net.minecraft.client.Minecraft.run(SourceFile:606)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT c15f4953 ----------

Quelqu'un aurait une explication et un moyen de faire marcher le jeu ?

Merci d'avance,
Jenon32