Помогите Launcher не дает сменить joinserver.

При попытке заменить bct.class в minecraft.jar, он выдает:

Код:

Client> дек 04, 2013 2:19:06 AM net.minecraft.launchwrapper.LogWrapper log
Client> INFO: Using tweak class name cpw.mods.fml.common.launcher.FMLTweaker
Client> 2013-12-04 02:19:07 [INFO] [ForgeModLoader] Forge Mod Loader version 6.2.62.871 for Minecraft 1.6.2 loading
Client> 2013-12-04 02:19:07 [INFO] [ForgeModLoader] Java is Java HotSpot(TM) Client VM, version 1.7.0_45, running on Windows 8:x86:6.2, installed at C:\Program Files\Java\jre7
Client> 2013-12-04 02:19:07 [WARNING] [ForgeModLoader] The coremod ic2.core.coremod.IC2core does not have a MCVersion annotation, it may cause issues with this version of Minecraft
Client> 2013-12-04 02:19:07 [INFO] [STDOUT] Loaded 39 rules from AccessTransformer config file fml_at.cfg
Client> 2013-12-04 02:19:07 [INFO] [STDOUT] Loaded 107 rules from AccessTransformer config file forge_at.cfg
Client> 2013-12-04 02:19:08 [WARNING] [ForgeModLoader] Problem loading class
Client> java.lang.SecurityException: SHA1 digest error for bct.class
Client>    at sun.security.util.ManifestEntryVerifier.verify(Unknown Source)
Client>    at java.util.jar.JarVerifier.processEntry(Unknown Source)
Client>    at java.util.jar.JarVerifier.update(Unknown Source)
Client>    at java.util.jar.JarVerifier$VerifierStream.read(Unknown Source)
Client>    at java.io.FilterInputStream.read(Unknown Source)
Client>    at net.minecraft.launchwrapper.LaunchClassLoader.readFully(LaunchClassLoader.java:289)
Client>    at net.minecraft.launchwrapper.LaunchClassLoader.getClassBytes(LaunchClassLoader.java:354)
Client>    at cpw.mods.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.getFieldType(FMLDeobfuscatingRemapper.java:215)
Client>    at cpw.mods.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.parseField(FMLDeobfuscatingRemapper.java:196)
Client>    at cpw.mods.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.setup(FMLDeobfuscatingRemapper.java:157)
Client>    at cpw.mods.fml.common.asm.FMLSanityChecker.injectData(FMLSanityChecker.java:244)
Client>    at cpw.mods.fml.relauncher.CoreModManager.injectTransformers(CoreModManager.java:428)
Client>    at cpw.mods.fml.relauncher.FMLLaunchHandler.injectPostfixTransformers(FMLLaunchHandler.java:108)
Client>    at cpw.mods.fml.relauncher.FMLLaunchHandler.appendCoreMods(FMLLaunchHandler.java:113)
Client>    at cpw.mods.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:80)
Client>    at net.minecraft.launchwrapper.Launch.launch(Launch.java:51)
Client>    at net.minecraft.launchwrapper.Launch.main(Launch.java:18)
Client> 2013-12-04 02:19:08 [SEVERE] [ForgeModLoader] Unable to launch
Client> java.lang.RuntimeException: java.lang.ArrayIndexOutOfBoundsException: 6
Client>    at cpw.mods.fml.relauncher.CoreModManager.injectTransformers(CoreModManager.java:433)
Client>    at cpw.mods.fml.relauncher.FMLLaunchHandler.injectPostfixTransformers(FMLLaunchHandler.java:108)
Client>    at cpw.mods.fml.relauncher.FMLLaunchHandler.appendCoreMods(FMLLaunchHandler.java:113)
Client>    at cpw.mods.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:80)
Client>    at net.minecraft.launchwrapper.Launch.launch(Launch.java:51)
Client>    at net.minecraft.launchwrapper.Launch.main(Launch.java:18)
Client> Caused by: java.lang.ArrayIndexOutOfBoundsException: 6
Client>    at org.objectweb.asm.ClassReader.readShort(Unknown Source)
Client>    at org.objectweb.asm.ClassReader.<init>(Unknown Source)
Client>    at org.objectweb.asm.ClassReader.<init>(Unknown Source)
Client>    at cpw.mods.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.getFieldType(FMLDeobfuscatingRemapper.java:220)
Client>    at cpw.mods.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.parseField(FMLDeobfuscatingRemapper.java:196)
Client>    at cpw.mods.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.setup(FMLDeobfuscatingRemapper.java:157)
Client>    at cpw.mods.fml.common.asm.FMLSanityChecker.injectData(FMLSanityChecker.java:244)
Client>    at cpw.mods.fml.relauncher.CoreModManager.injectTransformers(CoreModManager.java:428)
Client>    ... 5 more

Что делать?
Или если я сразу на лаунчер sashok поставлю, то minecraft запуститься?
Запускал через лаунчер Minecraft Launcher

 

Аплет подписан, удали метаинфу.