[15:59:56] [Server thread/ERROR]: Could not pass event PlayerInteractEvent to PistonAnimka v0.1
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:320) ~[craftbukkit-dev-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.2-50-gdce2b35-b3019jnks]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit-dev-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.2-50-gdce2b35-b3019jnks]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:486) [craftbukkit-dev-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.2-50-gdce2b35-b3019jnks]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:471) [craftbukkit-dev-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.2-50-gdce2b35-b3019jnks]
	at org.bukkit.craftbukkit.v1_7_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:195) [craftbukkit-dev-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.2-50-gdce2b35-b3019jnks]
	at net.minecraft.server.v1_7_R1.PlayerInteractManager.interact(PlayerInteractManager.java:374) [craftbukkit-dev-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.2-50-gdce2b35-b3019jnks]
	at net.minecraft.server.v1_7_R1.PlayerConnection.a(PlayerConnection.java:628) [craftbukkit-dev-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.2-50-gdce2b35-b3019jnks]
	at net.minecraft.server.v1_7_R1.PacketPlayInBlockPlace.a(SourceFile:60) [craftbukkit-dev-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.2-50-gdce2b35-b3019jnks]
	at net.minecraft.server.v1_7_R1.PacketPlayInBlockPlace.handle(SourceFile:9) [craftbukkit-dev-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.2-50-gdce2b35-b3019jnks]
	at net.minecraft.server.v1_7_R1.NetworkManager.a(NetworkManager.java:146) [craftbukkit-dev-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.2-50-gdce2b35-b3019jnks]
	at net.minecraft.server.v1_7_R1.ServerConnection.c(SourceFile:134) [craftbukkit-dev-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.2-50-gdce2b35-b3019jnks]
	at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:655) [craftbukkit-dev-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.2-50-gdce2b35-b3019jnks]
	at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:250) [craftbukkit-dev-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.2-50-gdce2b35-b3019jnks]
	at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:545) [craftbukkit-dev-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.2-50-gdce2b35-b3019jnks]
	at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:457) [craftbukkit-dev-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.2-50-gdce2b35-b3019jnks]
	at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [craftbukkit-dev-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.2-50-gdce2b35-b3019jnks]
Caused by: java.lang.IllegalArgumentException: Enchantment level is either too low or too high (given 4, bounds are 1 to 3)
	at org.bukkit.inventory.ItemStack.addEnchantment(ItemStack.java:430) ~[craftbukkit-dev-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.2-50-gdce2b35-b3019jnks]
	at pl.mranimekpl.piston.Main.onInteract(Main.java:63) ~[?:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_65]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[?:1.7.0_65]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_65]
	at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_65]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:318) ~[craftbukkit-dev-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.2-50-gdce2b35-b3019jnks]
	... 15 more