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is it just me but i cant get the train to move once its on the track ?

hey i just tried to install this mod for forge Build 7.8.0.708. when i start up my Server i get this error?

---- Minecraft Crash Report ----
// I'm sorry, Dave.
Time: 5/21/13 4:23 PM
Description: Exception in server tick loop
cpw.mods.fml.common.LoaderException: java.lang.NoClassDefFoundError: net/minecraft/client/multiplayer/WorldClient
at cpw.mods.fml.common.LoadController.transition(LoadController.java:142)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:691)
at cpw.mods.fml.server.FMLServerHandler.finishServerLoading(FMLServerHandler.java:93)
at cpw.mods.fml.common.FMLCommonHandler.onServerStarted(FMLCommonHandler.java:355)
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:141)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:430)
at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)
Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/multiplayer/WorldClient
at net.minecraftforge.client.MinecraftForgeClient.getStencilBits(MinecraftForgeClient.java:64)
at net.minecraftforge.client.MinecraftForgeClient.<clinit>(MinecraftForgeClient.java:68)
at noppes.npcs.items.ItemNpcInterface.<init>(ItemNpcInterface.java:20)
at noppes.npcs.items.ItemMusic.<init>(ItemMusic.java:11)
at noppes.npcs.items.ItemBanjo.<init>(ItemBanjo.java:8)
at noppes.npcs.CustomItems.load(CustomItems.java:145)
at noppes.npcs.CustomNpcs.load(CustomNpcs.java:139)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:494)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:165)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:98)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:690)
... 5 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.multiplayer.WorldClient
at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:238)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 38 more
Caused by: java.lang.RuntimeException: Attempted to load class bds for invalid side SERVER
at cpw.mods.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:50)
at cpw.mods.fml.relauncher.RelaunchClassLoader.runTransformers(RelaunchClassLoader.java:352)
at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:225)
... 40 more

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- System Details --
Details:
Minecraft Version: 1.5.2
Operating System: Windows Server 2008 (amd64) version 6.0
Java Version: 1.7.0_13, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 324905160 bytes (309 MB) / 428736512 bytes (408 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -Xms128M -Xmx1024M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v7.51 FML v5.2.12.708 Minecraft Forge 7.8.0.708 9 mods loaded, 9 mods active
mcp{7.44} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized
FML{5.2.12.708} [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
Forge{7.8.0.708} [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
CodeChickenCore{0.8.6.7} [CodeChicken Core] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
NotEnoughItems{1.5.2.14} [Not Enough Items] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
BiblioCraft{1.2.3} [BiblioCraft] (BiblioCraft[v1.2.3].zip) Unloaded->Constructed->Pre-initialized->Initialized
CustomSpawner{2.2.1} [DrZhark's CustomSpawner] (CustomMobSpawner 2.2.1.zip) Unloaded->Constructed->Pre-initialized->Initialized
CustomNpcs{0.8} [CustomNpcs] (CustomNPCs_1.5.2.zip) Unloaded->Constructed->Pre-initialized->Errored
MoCreatures{5.2.2} [DrZhark's Mo'Creatures Mod] (DrZharks MoCreatures Mod v5.2.2.zip) Unloaded->Constructed->Pre-initialized->Initialized
Profiler Position: N/A (disabled)
Is Modded: Definitely; Server brand changed to 'fml,forge'
Type: Dedicated Server (map_server.txt)