every time i try to play alpah for minecraft this pops up do you know how i can fix it?

  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 8/30/10 6:49 PM

Minecraft: Minecraft Alpha v1.0.17_04
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:196)
 at net.minecraft.client.Minecraft.run(SourceFile:553)
 at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 8e3bcd81 ----------