Miért nem megy a mincraft?

Windows 7-em van, van javám mégse működik.ezt irja ki: 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 2012.07.30. 18:05

inecraft: Minecraft Alpha v1.2.0_02

OS: Windows 7 (x86) version 6.1

Java: 1.7.0_05, Oracle Corporation

VM: Java HotSpot(TM) 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(SourceFile:198)at net.minecraft.client.Minecraft.run(SourceFile:560)

at java.lang.Thread.run(Unknown Source)

--- END ERROR REPORT 464e1c8a ----------