managed to get some more info out of the server -
14:48:26 [WARNING] [ForgeModLoader] Mod attempted to get a block ID with a default in the Terrain Generation section, mod authors should make sure there defaults are above 256 unless explicitly needed for terrain generation. Most ores do not need to be below 256.
14:48:26 [WARNING] [ForgeModLoader] Config "C:/Users/Miniwolfie/AppData/Roaming/.minecraft/ServerVanillaTest/config/Defence.cfg" Category: "block" Key: "fences" Default: 146
14:48:26 [WARNING] [ForgeModLoader] Mod attempted to get a block ID with a default in the Terrain Generation section, mod authors should make sure there defaults are above 256 unless explicitly needed for terrain generation. Most ores do not need to be below 256.
14:48:26 [WARNING] [ForgeModLoader] Config "C:/Users/Miniwolfie/AppData/Roaming/.minecraft/ServerVanillaTest/config/Defence.cfg" Category: "block" Key: "blockDefence" Default: 146
Edit - changed the ID´s but still no luck
14:52:25 [SEVERE] [ForgeModLoader] The following problems were captured during this phase
14:52:25 [SEVERE] [ForgeModLoader] Caught exception from F4113nC0r3
java.lang.ArrayIndexOutOfBoundsException: 4146
at amq.<init>(Block.java:324)
at f4113n.Defence.BlockFences.<init>(BlockFences.java:33)
at f4113n.Defence.DCore.init(DCore.java:48)
at f4113n.core.FCore.init(FCore.java:145)
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:487)
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: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.initializeMods(Loader.java:657)
at cpw.mods.fml.server.FMLServerHandler.finishServerLoading(FMLServerHandler.java:94)
at cpw.mods.fml.common.FMLCommonHandler.onServerStarted(FMLCommonHandler.java:355)
at ho.c(DedicatedServer.java:135)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:458)
at fy.run(SourceFile:849)
14:52:25 [INFO] [STDERR] java.lang.ArrayIndexOutOfBoundsException: 4146
14:52:25 [INFO] [STDERR] at amq.<init>(Block.java:324)
14:52:25 [INFO] [STDERR] at f4113n.Defence.BlockFences.<init>(BlockFences.java:33)
14:52:25 [INFO] [STDERR] at f4113n.Defence.DCore.init(DCore.java:48)
14:52:25 [INFO] [STDERR] at f4113n.core.FCore.init(FCore.java:145)
14:52:25 [INFO] [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
14:52:25 [INFO] [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
14:52:25 [INFO] [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
14:52:25 [INFO] [STDERR] at java.lang.reflect.Method.invoke(Unknown Source)
14:52:25 [INFO] [STDERR] at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:487)
14:52:25 [INFO] [STDERR] at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
14:52:25 [INFO] [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
14:52:25 [INFO] [STDERR] at java.lang.reflect.Method.invoke(Unknown Source)
14:52:25 [INFO] [STDERR] at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
14:52:25 [INFO] [STDERR] at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
14:52:25 [INFO] [STDERR] at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
14:52:25 [INFO] [STDERR] at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
14:52:25 [INFO] [STDERR] at com.google.common.eventbus.EventBus.post(EventBus.java:268)
14:52:25 [INFO] [STDERR] at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:140)
14:52:25 [INFO] [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
14:52:25 [INFO] [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
14:52:25 [INFO] [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
14:52:25 [INFO] [STDERR] at java.lang.reflect.Method.invoke(Unknown Source)
14:52:25 [INFO] [STDERR] at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
14:52:25 [INFO] [STDERR] at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
14:52:25 [INFO] [STDERR] at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
14:52:25 [INFO] [STDERR] at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
14:52:25 [INFO] [STDERR] at com.google.common.eventbus.EventBus.post(EventBus.java:268)
14:52:25 [INFO] [STDERR] at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:83)
14:52:25 [INFO] [STDERR] at cpw.mods.fml.common.Loader.initializeMods(Loader.java:657)
14:52:25 [INFO] [STDERR] at cpw.mods.fml.server.FMLServerHandler.finishServerLoading(FMLServerHandler.java:94)
14:52:25 [INFO] [STDERR] at cpw.mods.fml.common.FMLCommonHandler.onServerStarted(FMLCommonHandler.java:355)
14:52:25 [INFO] [STDERR] at ho.c(DedicatedServer.java:135)
14:52:25 [INFO] [STDERR] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:458)
14:52:25 [INFO] [STDERR] at fy.run(SourceFile:849)
14:52:25 [SEVERE] [Minecraft] Encountered an unexpected exception ArrayIndexOutOfBoundsException
java.lang.ArrayIndexOutOfBoundsException: 4146
at amq.<init>(Block.java:324)
at f4113n.Defence.BlockFences.<init>(BlockFences.java:33)
at f4113n.Defence.DCore.init(DCore.java:48)
at f4113n.core.FCore.init(FCore.java:145)
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:487)
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: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.initializeMods(Loader.java:657)
at cpw.mods.fml.server.FMLServerHandler.finishServerLoading(FMLServerHandler.java:94)
at cpw.mods.fml.common.FMLCommonHandler.onServerStarted(FMLCommonHandler.java:355)
at ho.c(DedicatedServer.java:135)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:458)
at fy.run(SourceFile:849)