Help!caricamento Minecraft!

[Pichcatimate 0]

Ciao ragazzi quando minecraft finisce il caricamento la schermata rimane nera per circa 5 secondi e poi mi appare questo errore Cosa devo fare vi prego aiutatemi!!!!

Bad video card drivers!

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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 10/02/12 15.18

Minecraft: Minecraft 1.1

OS: Windows 7 (amd64) version 6.1

Java: 1.6.0_30, Sun Microsystems Inc.

VM: Java HotSpot™ 64-Bit Server 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:230)

at net.minecraft.client.Minecraft.run(SourceFile:648)

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

--- END ERROR REPORT 994b6865 ----------