Miért fut a Minecraft 256 szinben? Segitsééég!?!?

Ha letöltöm akkor 256 szinben fut valamiért,a beállitásoknál nincs 256 szin módra rakva,win7em van,próbáltam kompatibilissá tenni XP vel is,de ugy is 256 szinben fut... miért???

Minecraft has crashed!

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Minecraft has stopped running because it encountered a problem.

If you wish to report this, please copy this entire text and email it to support@mojang.com.

Please include a description of what you did when the error occured.

--- BEGIN ERROR REPORT a1dce528 --------

Generated 18.10.11 17:37

Minecraft: Minecraft Beta 1.8.1

OS: Windows XP (x86) version 5.1

Java: 1.6.0_27, 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: Insufficient color precision

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:233)

at net.minecraft.client.Minecraft.run(SourceFile:629)

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

--- END ERROR REPORT d601b1ab ----------