Minecraft ne veux pas se demarrer

Bonjour,
j'ai un window xp de1998 et je voudrais jouer a minecraft dessus mais il me dit sa :


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 25/06/11 11:25

Minecraft: Minecraft Beta 1.6.6
OS: Windows XP (x86) version 5.1
Java: 1.6.0_20, 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:287)
at net.minecraft.client.Minecraft.run(SourceFile:683)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 9792edcf ----------

et moi je ne sais pas comment faire merci de vos reponse