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java.lang.NullPointerException: 	at mytown.protection.ProtectionManager.checkExist(ProtectionManager.java:123)	at mytown.protection.ProtectionHandlers.checkSpawn(ProtectionHandlers.java:461)	at cpw.mods.fml.common.eventhandler.ASMEventHandler_91_ProtectionHandlers_checkSpawn_CheckSpawn.invoke(.dynamic)	at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)	at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140)	at net.minecraftforge.event.ForgeEventFactory.canEntitySpawn(ForgeEventFactory.java:112)	at drzhark.customspawner.CustomSpawner.performWorldGenSpawning(CustomSpawner.java:790)	at drzhark.customspawner.EventHooks.peformCustomWorldGenSpawning(EventHooks.java:51)	at cpw.mods.fml.common.eventhandler.ASMEventHandler_52_EventHooks_peformCustomWorldGenSpawning_Populate.invoke(.dynamic)	at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)	at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140)	at net.minecraftforge.event.terraingen.TerrainGen.populate(TerrainGen.java:36)	at net.minecraft.world.gen.ChunkProviderGenerate.func_73153_a(ChunkProviderGenerate.java:400)	at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:279)	at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1055)	at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:190)	at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:131)	at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:101)	at net.minecraft.server.MinecraftServer.func_71222_d(MinecraftServer.java:265)	at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:235)	at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:258)	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:387)	at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)