Game crashes when I click mods and texture packs in beta 1.1

I am using the new launcher feature to do this here is the crash report+


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 11/19/13 7:38 PM

Minecraft: Minecraft Beta 1.1_02
OS: Windows XP (x86) version 5.1
Java: 1.7.0_45, Oracle Corporation
VM: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
LWJGL: 2.9.0
OpenGL: AMD Radeon HD 6570 version 4.2.11762 Compatibility Profile Context, ATI Technologies Inc.

java.nio.BufferOverflowException
at java.nio.DirectByteBuffer.put(Unknown Source)
at java.nio.ByteBuffer.put(Unknown Source)
at ge.a(SourceFile:148)
at ge.a(SourceFile:88)
at ot.c(SourceFile:73)
at dq.a(SourceFile:168)
at kr.b(SourceFile:331)
at net.minecraft.client.Minecraft.run(SourceFile:704)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 49600f8c ----------


please help if you can