Problème card driver 'minecraft'

help Window Xp

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 26/08/11 13:09

Minecraft: Minecraft Beta 1.7.3
OS: Windows XP (x86) version 5.1
Java: 1.6.0_27, 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.nChoosePixelForma
t(Native Method)
at
org.lwjgl.opengl.WindowsPeerInfo.choosePixelFormat
(WindowsPeerInfo.java:52)
at
org.lwjgl.opengl.WindowsDisplay.createWindow(Windo
wsDisplay.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:294)
at
net.minecraft.client.Minecraft.run(SourceFile:716)

at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 7419128a ----------

où est le problème svp

cordialement X_xray95