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.