Bukkit

What steps will reproduce the problem?
1. Loading Showcase

01:24:44 [SEVERE] Error occurred while enabling Showcase v0.7.4 (Is it up to date?): com/narrowtux/translation/Translation
java.lang.NoClassDefFoundError: com/narrowtux/translation/Translation
    at de.moritzschmale.showcase.ShowcaseMain.onEnable(ShowcaseMain.java:104)
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:126)
    at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:920)
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:278)
    at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:173)
    at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:156)
    at org.bukkit.craftbukkit.CraftServer.reload(CraftServer.java:410)
    at org.bukkit.Bukkit.reload(Bukkit.java:173)
    at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:22)
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:163)
    at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:353)
    at net.minecraft.server.NetServerHandler.handleCommand(NetServerHandler.java:756)
    at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:721)
    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:714)
    at net.minecraft.server.Packet3Chat.a(Packet3Chat.java:33)
    at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:92)
    at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:501)
    at net.minecraft.server.NetworkListenThread.a(SourceFile:108)
    at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:464)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:374)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:417)
Caused by: java.lang.ClassNotFoundException: com.narrowtux.translation.Translation
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:36)
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:24)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 22 more