https://www.fmforum.net/server_mod/6206 의 최신버전을 깔고 했는데 안됩니다.

---- Minecraft Crash Report ----

WARNING: coremods are present:
  LoadingPlugin (b77_18f.jar)
  RenderPlayerAPIPlugin (RenderPlayerAPI-1.8-1.3.jar)
  SpongeCoremod (sponge-1.8-1515-2.1DEV-678.jar)
  SmartCorePlugin (SmartCore-1.8-1.1.jar)
  SpongeCoremod (spongeforge-1.8-1577-3.0.0-BETA-1000.jar)
  PlayerAPIPlugin (PlayerAPI-1.8-1.1.jar)
Contact their authors BEFORE contacting forge

// On the bright side, I bought you a teddy bear!

Time: 16. 10. 2 오후 3:14
Description: Exception in server tick loop

java.lang.NoClassDefFoundError: net/minecraft/client/gui/GuiScreen
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Unknown Source)
    at net.minecraftforge.fml.common.Loader.identifyMods(Loader.java:334)
    at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:483)
    at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:87)
    at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:355)
    at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:117)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:438)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.gui.GuiScreen
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 9 more
Caused by: net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerException: Exception in class transformer net.minecraftforge.fml.common.asm.transformers.SideTransformer@144435b from coremod FMLCorePlugin
    at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:234)
    at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279)
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176)
    ... 11 more
Caused by: java.lang.RuntimeException: Attempted to load class bxf for invalid side SERVER
    at net.minecraftforge.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:49)
    at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:230)
    ... 13 more

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

-- System Details --
Details:
    Minecraft Version: 1.8
    Operating System: Windows 8.1 (x86) version 6.3
    Java Version: 1.8.0_101, Oracle Corporation
    Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
    Memory: 831019616 bytes (792 MB) / 1037959168 bytes (989 MB) up to 1037959168 bytes (989 MB)
    JVM Flags: 2 total; -Xms1G -Xmx1G
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP v9.10 FML v8.0.99.99 Minecraft Forge 11.14.4.1577 3 mods loaded, 0 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
        mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) 
        FML{8.0.99.99} [Forge Mod Loader] ([SpongeAPI]FreeRoute_1.8_Core.jar) 
        Forge{11.14.4.1577} [Minecraft Forge] ([SpongeAPI]FreeRoute_1.8_Core.jar) 
    Loaded coremods (and transformers): 
LoadingPlugin (b77_18f.jar)
  kp.forge.ClassTransformer
RenderPlayerAPIPlugin (RenderPlayerAPI-1.8-1.3.jar)
  api.player.forge.RenderPlayerAPITransformer
SpongeCoremod (sponge-1.8-1515-2.1DEV-678.jar)
  
SmartCorePlugin (SmartCore-1.8-1.1.jar)
  net.smart.core.SmartCoreTransformer
SpongeCoremod (spongeforge-1.8-1577-3.0.0-BETA-1000.jar)
  
PlayerAPIPlugin (PlayerAPI-1.8-1.1.jar)
  api.player.forge.PlayerAPITransformer
    Profiler Position: N/A (disabled)
    Is Modded: Definitely; Server brand changed to 'fml,forge,SpongeForge'
    Type: Dedicated Server (map_server.txt)

자바 8_u101 버전입니다.
자바 7을 깔든 자바 8_u45를 깔든 안되네요