Start up error

[Deleted user]

2013-02-15 10:48:45 [SEVERE] Could not load 'plugins\SkylandsPlus.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: com/comphenix/protocol/events/PacketListener
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:184)
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:305)
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:230)
at org.bukkit.craftbukkit.v1_4_R1.CraftServer.loadPlugins(CraftServer.java:239)
at org.bukkit.craftbukkit.v1_4_R1.CraftServer.(CraftServer.java:217)
at net.minecraft.server.v1_4_R1.PlayerList.(PlayerList.java:55)
at net.minecraft.server.v1_4_R1.DedicatedPlayerList.(SourceFile:11)
at net.minecraft.server.v1_4_R1.DedicatedServer.init(DedicatedServer.java:104)
at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:399)
at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849)
Caused by: java.lang.NoClassDefFoundError: com/comphenix/protocol/events/PacketListener
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:173)
... 9 more
Caused by: java.lang.ClassNotFoundException: com.comphenix.protocol.events.PacketListener
at java.net.URLClassLoader$1.run(Unknown Source)
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.findClass0(PluginClassLoader.java:80)
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:53)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 12 more

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Some server info:

[Bukkit] : CraftBukkit version git-Bukkit-1.4.7-R1.0-b2624jnks (MC: 1.4.7) (Implementing API version 1.4.7-R1.0)

[Multiverse-Core] : Multiverse-Core v2.5-b655

SkylandsPlus v0.15

[betterphp]

Update ProtocolLib.