проблемы с minecraft

[6YJIb]

Minecraft has crashed!
----------------------

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 18.02.11 16:44

Minecraft: Minecraft Beta 1.1_02
OS: Windows XP (x86) version 5.1
Java: 1.6.0_24, Sun Microsystems Inc.
VM: Java HotSpot(TM) Client VM (mixed mode), Sun Microsystems Inc.
LWJGL: 2.4.2
OpenGL: GeForce GTS 250/PCI/SSE2 version 3.2.0, NVIDIA Corporation

java.lang.NullPointerException
at bz.a(SourceFile:157)
at f.a(SourceFile:978)
at kr.c(SourceFile:372)
at kr.b(SourceFile:312)
at net.minecraft.client.Minecraft.run(SourceFile:704)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 7869bfb9 ----------




Что делать???