Mi minecraft se cierra

Hola, bueno cuando abro minecraft esta todo normal pero cuando doy click en Multijugador,en vez de que me salgan los servers me sale una pantalla de bloques de tierra y enseguida se cierra y me da el reporte de crasheo, pero cuando abro Un Jugador va todo bien y si entro a un mundo no se me crashea. El Reporte de Crasheo es este:
---- Minecraft Crash Report ----
// Don’t be sad. I’ll do better next time, I promise!

Time: 6/02/16 22:06
Description: Rendering screen

java.lang.IllegalArgumentException: bad Base64 input character at 7399: 0 (decimal)
at io.netty.handler.codec.base64.Base64.decode(Base64.java:247)
at io.netty.handler.codec.base64.Base64.decode(Base64.java:197)
at io.netty.handler.codec.base64.Base64.decode(Base64.java:188)
at azk.c(SourceFile:212)
at azk.a(SourceFile:145)
at awd.a(SourceFile:25)
at awi.b(SourceFile:412)
at awi.a(SourceFile:211)
at azh.a(SourceFile:291)
at bfk.a(SourceFile:1039)
at ave.av(SourceFile:915)
at ave.a(SourceFile:325)
at net.minecraft.client.main.Main.main(SourceFile:124)

A detailed walkthrough of the error, its code path and all known details is as follows:

– Head –
Stacktrace:
at io.netty.handler.codec.base64.Base64.decode(Base64.java:247)
at io.netty.handler.codec.base64.Base64.decode(Base64.java:197)
at io.netty.handler.codec.base64.Base64.decode(Base64.java:188)
at azk.c(SourceFile:212)
at azk.a(SourceFile:145)
at awd.a(SourceFile:25)
at awi.b(SourceFile:412)
at awi.a(SourceFile:211)
at azh.a(SourceFile:291)

– Screen render details –
Details:
Screen name: azh
Mouse location: Scaled: (217, 144). Absolute: (434, 190)
Screen size: Scaled: (348, 240). Absolute: (696, 480). Scale factor of 2
Stacktrace:
at bfk.a(SourceFile:1039)
at ave.av(SourceFile:915)
at ave.a(SourceFile:325)
at net.minecraft.client.main.Main.main(SourceFile:124)

– System Details –
Details:
Minecraft Version: 1.8.8
Operating System: Windows XP (x86) version 5.1
Java Version: 1.7.0_02, Oracle Corporation
Java VM Version: Java HotSpot™ Client VM (mixed mode), Oracle Corporation
Memory: 185211064 bytes (176 MB) / 359817216 bytes (343 MB) up to 523501568 bytes (499 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 1.8.8
LWJGL: 2.9.4
OpenGL: Intel 865G GL version 1.3.0 - Build 4.14.10.4544, Intel
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Not using framebuffer objects because OpenGL 1.4 is not supported, EXT_blend_func_separate is supported, OpenGL 3.0 is not supported, ARB_framebuffer_object is not supported, and EXT_framebuffer_object is not supported.
Shaders are not available because OpenGL 2.1 is not supported, ARB_shader_objects is not supported, ARB_vertex_shader is not supported, and ARB_fragment_shader is not supported.
VBOs are available because ARB_vertex_buffer_object is supported.

Using VBOs: No
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: Default
Current Language: Español (México)
Profiler Position: N/A (disabled)
CPU: 1x Intel(R) Pentium(R) 4 CPU 2.80GHz

Espero que me puedan ayudar.

PD:Mi minecraft es pirata y uso el launcher TeamExtreme, y no uso mods y es la version 1.8.8