[16:30:48] [Server thread/ERROR]: Error occurred while enabling VillageMarker v0.39 (Is it up to date?)
java.lang.NoClassDefFoundError: net/minecraft/server/v1_7_R1/Packet
        at de.siemering.plugin.villagemarker.VillageMarker.onEnable(VillageMarker.java:31) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:250) ~[spigot.jar:git-Spigot-1470]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:324) [spigot.jar:git-Spigot-1470]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [spigot.jar:git-Spigot-1470]
        at org.bukkit.craftbukkit.v1_7_R3.CraftServer.loadPlugin(CraftServer.java:467) [spigot.jar:git-Spigot-1470]
        at org.bukkit.craftbukkit.v1_7_R3.CraftServer.enablePlugins(CraftServer.java:385) [spigot.jar:git-Spigot-1470]
        at net.minecraft.server.v1_7_R3.MinecraftServer.n(MinecraftServer.java:359) [spigot.jar:git-Spigot-1470]
        at net.minecraft.server.v1_7_R3.MinecraftServer.g(MinecraftServer.java:333) [spigot.jar:git-Spigot-1470]
        at net.minecraft.server.v1_7_R3.MinecraftServer.a(MinecraftServer.java:289) [spigot.jar:git-Spigot-1470]
        at net.minecraft.server.v1_7_R3.DedicatedServer.init(DedicatedServer.java:193) [spigot.jar:git-Spigot-1470]
        at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:450) [spigot.jar:git-Spigot-1470]
        at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [spigot.jar:git-Spigot-1470]
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_7_R1.Packet
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:67) ~[spigot.jar:git-Spigot-1470]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62) ~[spigot.jar:git-Spigot-1470]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425) ~[?:1.7.0_55]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ~[?:1.7.0_55]
        ... 12 more