My server wont start..please help

[HAFMC]

well i decided to build a server computer and host a server so me and a few buddies of mine could play together in peace, however upon downloading the "unleashed" server version and getting it setup with mcmyadmin, when i start the server i get this followed by a crash...here is the report....any help would be greatly appreciated....many thanks in advance fellas...

---- Minecraft Crash Report ----
// I just don't know what went wrong

Time: 20/09/13 9:45 PM
Description: Exception in server tick loop

cpw.mods.fml.common.LoaderException: java.lang.NoSuchMethodError: argo.jdom.JsonNode.getFieldList()Ljava/util/List;
at cpw.mods.fml.common.LoadController.transition(LoadController.java:147)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:692)
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:431)
at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)
Caused by: java.lang.NoSuchMethodError: argo.jdom.JsonNode.getFieldList()Ljava/util/List;
at openperipheral.common.definition.DefinitionJsonMethod.<init>(DefinitionJsonMethod.java:79)
at openperipheral.common.definition.DefinitionJsonClass.<init>(DefinitionJsonClass.java:29)
at openperipheral.common.definition.DefinitionJsonMod.<init>(DefinitionJsonMod.java:25)
at openperipheral.common.definition.DefinitionManager.load(DefinitionManager.java:26)
at openperipheral.OpenPeripheral.init(OpenPeripheral.java:167)
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.GeneratedMethodAccessor1.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:313)
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.sendEventToModContainer(LoadController.java:192)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:172)
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:313)
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:103)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:691)
... 5 more

 

[Yarmath]

I just had this error as well. Delete OpenPeripherals from the mod list and it should work.

 

[HAFMC]

tried that as well...still a no go...gives me a whole new pile of stuff then...

 

[Yarmath]

Have you set McMyAdmin to be running Feed the Beast and changed its ftbsever.jar to FTB-Beta-A.jar?

 

[HAFMC]

yup done all of that...dotted the I's and crossed the T's ...just reinstalled the whole server...see what i does this time.... i managed to get Ultimate to work on the server but i dont want that one mainly due to that cheaty voxel map...so im gonna retry to get unleashed up and running... ill let you know the outcome in a min[DOUBLEPOST=1379731837][/DOUBLEPOST]SUCCESS...minus a few id mismatches from client side... seems a bunch of reinstalls did the trick :/ i dont even know what i done to mange to fix this issue... i installed ultimate got that to work, so rather then delete everything that was in the "minecraft" folder i just removed everything but <plugins, serverproperties,serverstart> and reinstalled the unleashed modpack back into the "minecraft folder" and started up mcmyadmin again and way it went...now to j ust change up the id mismatches...