I'm having issues trying to get any mod to work with forge

I've tried several times getting a brand new minecraft_server.jar but it won't help

Maybe I'm doing something wrong...

I download minecraft_server.jar, open it with winrar drag all the files from forge into it (I'm using the recommended build from http://www.minecraftforge.net/forum/index.php/topic,5.0.html) I then start the server and everything works fine. It creates a mod and coremods folder.

Now I try to put a mod in the mod folder and start the server and I keep getting error messages along the lines of this

 

 

[sEVERE] Encountered an unexpected exception LoaderException

cpw.mods.fml.common.LoaderException: java.lang.ClassNotFoundException: dungeonpack.DungeonPack

at cpw.mods.fml.common.LoadController.transition(LoadController.java:102)

at cpw.mods.fml.common.Loader.loadMods(Loader.java:467)

at cpw.mods.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:80)

at cpw.mods.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:340)

at ft.b(DedicatedServer.java:49)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:433)

at ep.run(SourceFile:539)

Caused by: java.lang.ClassNotFoundException: dungeonpack.DungeonPack

at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:125)

at java.lang.ClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at cpw.mods.fml.common.ModClassLoader.loadClass(ModClassLoader.java:57)

at java.lang.Class.forName0(Native Method)

at java.lang.Class.forName(Unknown Source)

at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:407)

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:124)

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:81)

at cpw.mods.fml.common.Loader.loadMods(Loader.java:466)

... 5 more

Caused by: java.lang.NullPointerException

at org.objectweb.asm.ClassReader.<init>(Unknown Source)

at cpw.mods.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:27)

at cpw.mods.fml.relauncher.RelaunchClassLoader.runTransformers(RelaunchClassLoader.java:162)

at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:118)

... 32 more

[sEVERE] This crash report has been saved to: C:\Users\Tristan\Desktop\serv\.\crash-reports\crash-2012-10-17_05.58.30-server.txt

 

Obviously some of that is mod specific but I keep getting the same error with every mod. Here's some links to some of the mods I've tried to install and still got similar messages.

 

http://www.minecraftforum.net/topic/1340914-132smpbukkitforgedungeonpack22-dungeonsboss2-npc-villages-v4-5-new-dungeons/

http://www.minecraftforum.net/topic/1152139-minecraft-132-netherrocks-mod-ssp-smp/

http://www.minecraftforum.net/topic/1478978-132-extended-items-mod-extended-foods-mod-6k-downloads/

 

I've tried many more and all give the same error.

I'm using a standard vanilla server, and I've tried fresh everything with almost every one of these mods.

For the love of god, DO NOT unzip the dungeonpack zip!!!!!