hi, i am making a new mod in minecraft and it all works in ssp, but as soon as i try and run a server or open a Lan world it crashes, i will paste the error log at the bottom of this post. i am probably doing something really stupid. As far as i can tell i am missing an important class file but i do not know where i am meant to put this file and what in it. any help is appreaciated.

 

[iNFO] Starting minecraft server version 1.4.6

[sEVERE] Encountered an unexpected exception LoaderException

cpw.mods.fml.common.LoaderException: java.lang.ClassNotFoundException: ashtonsmod.common.CommonProxy.ashtonsmod

at cpw.mods.fml.common.ProxyInjector.inject(ProxyInjector.java:69)

at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:455)

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 net.minecraft.server.dedicated.DedicatedServer.startServer(DedicatedServer.java:64)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:458)

at net.minecraft.server.ThreadMinecraftServer.run(ThreadMinecraftServer.java:16)

Caused by: java.lang.ClassNotFoundException: ashtonsmod.common.CommonProxy.ashtonsmod

at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:179)

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.ProxyInjector.inject(ProxyInjector.java:52)

... 27 more

Caused by: java.lang.NullPointerException

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

at net.minecraftforge.transformers.EventTransformer.transform(EventTransformer.java:29)

at cpw.mods.fml.relauncher.RelaunchClassLoader.runTransformers(RelaunchClassLoader.java:222)

at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:171)

... 33 more

[sEVERE] This crash report has been saved to: C:\Users\owner\Desktop\Modding\jars\.\crash-reports\crash-2013-03-05_12.36.14-server.txt

the help is gratefully accepted and it is now working, i knew it was something silly