Server na modach nie chce mi odpalić i ciągle wyskakuje crash

[Thepepus]

 [iNFO] Starting minecraft server version 1.6.4
 [iNFO] Loading properties
 [iNFO] Default game type: SURVIVAL
 [iNFO] Generating keypair
 [iNFO] Starting Minecraft server on 25.48.7.15:25565
 [WARNING] **** SERVER IS RUNNING IN OFFLINE/INSECURE MODE!
 [WARNING] The server will make no attempt to authenticate usernames. Beware.
 [WARNING] While this makes the game possible to play without internet access, it also opens up the ability for hackers to connect with any username they choose.
 [WARNING] To change this, set "online-mode" to "true" in the server.properties file.
 [iNFO] Preparing level "world"
 [sEVERE] Encountered an unexpected exception NoClassDefFoundError
java.lang.NoClassDefFoundError: net/minecraft/client/multiplayer/WorldClient
    at net.minecraft.server.management.PlayerManager.<init>(PlayerManager.java:55)
    at net.minecraft.world.WorldServer.<init>(WorldServer.java:113)
    at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:246)
    at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:187)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:445)
    at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.multiplayer.WorldClient
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:186)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 6 more
Caused by: java.lang.RuntimeException: Attempted to load class bdd for invalid side SERVER
    at cpw.mods.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:50)
    at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:274)
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:172)
    ... 8 more
 [sEVERE] This crash report has been saved to: C:\Users\Dawid\Desktop\server\.\crash-reports\crash-2017-01-20_15.53.27-server.txt

[fajnykoles442]

powinno się zamazywać ip i polecam pobrać nowy silnik i może mody psują :P