Erreur serveur minecraft cauldron

Bonjour, enfait j'ai un problème sur mon serveur minecraft et sa m'énerve... j'essais de le debug mais sais trop dur quelqu'un peux m'aider? je vous met le crach report ici

---- Minecraft Crash Report ----
// You're mean.

Time: 21/12/14 11:59
Description: Exception in server tick loop

java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft
at fiskfille.lightsabers.main.LightsabersEventHandler.onLivingJump(LightsabersEventHandler.java:45)
at cpw.mods.fml.common.eventhandler.ASMEventHandler_7_LightsabersEventHandler_onLivingJump_LivingJumpEvent.invoke(.dynamic)
at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)
at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:138)
at net.minecraftforge.common.ForgeHooks.onLivingJump(ForgeHooks.java:354)
at net.minecraft.entity.EntityLivingBase.func_70664_aZ(EntityLivingBase.java:1646)
at net.minecraft.entity.player.EntityPlayer.func_70664_aZ(EntityPlayer.java:1834)
at net.minecraft.network.NetHandlerPlayServer.func_147347_a(NetHandlerPlayServer.java:528)
at net.minecraft.network.play.client.C03PacketPlayer.func_148833_a(C03PacketPlayer.java:36)
at net.minecraft.network.play.client.C03PacketPlayer$C06PacketPlayerPosLook.func_148833_a(C03PacketPlayer.java:234)
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:244)
at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:173)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:980)
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:423)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:798)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:658)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.Minecraft
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 17 more
Caused by: java.lang.RuntimeException: Attempted to load class bao for invalid side SERVER
at cpw.mods.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:51)
at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279)
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176)
... 19 more


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

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 31574472 bytes (30 MB) / 239075328 bytes (228 MB) up to 239075328 bytes (228 MB)
JVM Flags: 4 total; -XX:PermSize=128m -XX:MaxPermSize=256m -Xmx256m -Xms256m
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
FML: MCP v9.05 FML v7.10.85.1236 Cauldron-MCPC-Plus vgit-Cauldron-MCPC-Plus-1.7.10-1.1236.06.212 (MC: 1.7.10) (API v1.7.10-R0.1-SNAPSHOT) Minecraft Forge 10.13.2.1236 5 mods loaded, 5 mods active
mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML{7.10.85.1236} [Forge Mod Loader] (cauldron-1.7.10-1.1236.05.212-server.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge{10.13.2.1236} [Minecraft Forge] (cauldron-1.7.10-1.1236.05.212-server.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
lightsabers{0.7.1} [Advanced Lightsabers Mod] (Advanced-Lightsaber-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
RioV{v2.4.8} [The Mists of RioV] (The-Mists-of-RioV-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Player Count: 1 / 20; [EntityPlayerMP['DKSklaypex'/203, l='world', x=446,25, y=95,00, z=75,30](DKSklaypex at 446.2516479590405,95.0,75.30000001192093)]
Is Modded: Definitely; Server brand changed to 'cauldron,craftbukkit,mcpc,fml,forge'
Type: Dedicated Server (map_server.txt)