Problema con mi servidor LAN

Hola querida comunidad de forominecraft, soy nitropic y tengo un problemilla con mi servidor, es un servidor LAN (pero a través de minecraft_server.jar) para jugar con mis hermanos y eso, y funciona, pero quise añadirle mods y estos son el problema, no funciona ni uno, seguí tutoriales y todo [los mods funcionan normal en single player o incluso abriendo una partida LAN, dentro de una SP (teniendo todos exactamente el mismo minecraft con los mismos mods)].

Os adjunto también el archivo de crash report del servidor a ver si ayuda!:

---- Minecraft Crash Report ----// Everything's going to plan. No, really, that was supposed to happen.


Time: 06/01/13 17:07
Description: Exception in server tick loop


java.lang.NoClassDefFoundError: aud
	at java.lang.Class.getDeclaredMethods0(Native Method)
	at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
	at java.lang.Class.getDeclaredMethods(Unknown Source)
	at cpw.mods.fml.common.FMLModContainer.gatherAnnotations(FMLModContainer.java:308)
	at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:453)
	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:69)
	at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
	at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
	at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
	at com.google.common.eventbus.EventBus.post(EventBus.java:268)
	at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:140)
	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:69)
	at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
	at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
	at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
	at com.google.common.eventbus.EventBus.post(EventBus.java:268)
	at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:83)
	at cpw.mods.fml.common.Loader.loadMods(Loader.java:478)
	at cpw.mods.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:86)
	at cpw.mods.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:345)
	at ho.c(DedicatedServer.java:64)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:458)
	at fy.run(SourceFile:849)
Caused by: java.lang.ClassNotFoundException: aud
	at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:179)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 31 more
Caused by: java.lang.NullPointerException
	at org.objectweb.asm.ClassReader.<init>(Unknown Source)
	at codechicken.core.asm.ClassHeirachyManager.transform(ClassHeirachyManager.java:80)
	at cpw.mods.fml.relauncher.RelaunchClassLoader.runTransformers(RelaunchClassLoader.java:222)
	at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:171)
	... 33 more




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


-- System Details --
Details:
	Minecraft Version: 1.4.6
	Operating System: Windows 8 (amd64) version 6.2
	Java Version: 1.7.0_09, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 1352711048 bytes (1290 MB) / 1386938368 bytes (1322 MB) up to 1908932608 bytes (1820 MB)
	JVM Flags: 2 total; -Xms1024M -Xmx2048M
	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 v7.25 FML v4.6.17.515 Minecraft Forge 6.5.0.489 26 mods loaded, 26 mods active
	mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed
	FML [Forge Mod Loader] (coremods) Unloaded->Constructed
	Forge [Minecraft Forge] (coremods) Unloaded->Constructed
	mod_CodeChickenCore [CodeChicken Core] (coremods) Unloaded->Constructed
	mod_NotEnoughItems [Not Enough Items] (coremods) Unloaded->Constructed
	GuiAPI [GuiAPI] (GuiAPI-1.4.7.jar) Unloaded
	SAP_Man [SanAndreasPs Managers] (0_SAPManPack_v13.jar) Unloaded
	jammyfurniture [Jammy Furniture Mod] (1.4.6_Jammy_Furniture_Mod_V4.0.zip) Unloaded
	mod_ReiMinimap [mod_ReiMinimap] ([1.4.6]ReiMinimap_v3.2_06.zip) Unloaded
	BWCoreBlocks [Better World Core Blocks] (betterworld-CB-1.8.zip) Unloaded
	BWPAF [Better World Plants and Food] (betterworld-PAF-1.8b.zip) Unloaded
	ClaySoldiersMod [Clay Soldiers Mod] (CSM_v9_05.jar) Unloaded
	ExtrabiomesXL [ExtrabiomesXL] (ExtrabiomesXL-universal-1.4.6-3.7.0a.jar) Unloaded
	FlansMod [Flan's Mod] (Flans-Mod-1.4.6.zip) Unloaded
	GraviGun [GraviGun] (GravityGun1.4.6v1.zip) Unloaded
	mod_MAtmos [mod_MAtmos] (matmos_packaged.zip) Unloaded
	mod_Thx [mod_Thx] (mod_thx_helicopter_mc146_v020.zip) Unloaded
	mod_Toggle [mod_Toggle] (mod_Togglev1.4.6.0.zip) Unloaded
	SimpleRecipes [Pam's Simple Recipes] (Pams-Simple-Recipes-Mod.zip) Unloaded
	ProjectZulu|Core [Project Zulu Core] (ProjectZuluCompletev0.6.1.zip) Unloaded
	ProjectZulu|Blocks [Project Zulu Block and Items] (ProjectZuluCompletev0.6.1.zip) Unloaded
	ProjectZulu|Mobs [Project Zulu Mobs] (ProjectZuluCompletev0.6.1.zip) Unloaded
	ProjectZulu|World [Project Zulu World] (ProjectZuluCompletev0.6.1.zip) Unloaded
	weaponmod [Balkon's WeaponMod] (Weaponmod.zip) Unloaded
	IDResolver [ID Resolver] (IDResolver-1.4.6.0.jar) Unloaded
	MSC [Mob Spawn Controls] (Forge_MobSpawnControlsv1.4.6.0.zip) Unloaded
	Profiler Position: N/A (disabled)
	Is Modded: Definitely; Server brand changed to 'fml'
	Type: Dedicated Server (map_server.txt)

Este es el log completo y con todos los mods puestos (que quizás alguno no sea compatible, pero parece que no es por eso, porque los probe por separado y siempre da error incluso mods que a la gente les he visto funcionar en server, o incluso a mi me van en SP como he dicho)

Muchas gracias de antemano. Y perdón enrollarme.

A ver si lo adivino… tienes instalado GuiApi en coremods?
GuiApi debe instalarse solo en los clientes, no en el servidor…

Bueno, varias cosas… No todos los mods que funcionan en singleplayer tienen versión para multiplayer. Lo segundo, todos los mods tienen dependencias de APIs, es decir, que si no le has instalado al servidor alguna API como Forge, ModloaderMP o la que sea que requieran no van a funcionar.

Totalmente cierto, pero no te calientes. Este error (“java.lang.NoClassDefFoundError: aud”) es porque no encuentra un fichero que existe solo en el cliente, y el sospechoso habitual es GuiApi. Tipico fallo de principiante… montas los mods en el cliente, lo tienes guay, copias config, coremods y mods al servidor y te dejas guiapi en coremods… badabum!

Buscalo en ingles, veras como todos dan la misma respuesta; quita guiapi del servidor.