i need to fix this

i really want to fix this and i dont know how to. and i know it has to do with open gl.

Mods loaded: 1
ModLoader 1.1

  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 60e50b27 --------
Generated 3/31/12 7:51 PM

Minecraft: Minecraft 1.1
OS: Windows XP (x86) version 5.1
Java: 1.7.0_03, Oracle Corporation
VM: Java HotSpot™ Client VM (mixed mode), Oracle Corporation
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(Minecraft.java:295)
at net.minecraft.client.Minecraft.run(Minecraft.java:624)
at java.lang.Thread.run(Unknown Source)
— END ERROR REPORT b636f63f ----------

does any one know how to fix this error

Switch your desktop resolution to 32-bit color, instead of 24-bit or 16-bit.