DisguiseCraft Error

[11:48:22 INFO]: [PermissionsEx] sql backend registered!
[11:48:22 INFO]: [PermissionsEx] file backend registered!
[11:48:22 ERROR]: Could not load 'plugins/DisguiseCraft.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: net/minecraft/server/v1_8_R2/Packet
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:135) ~[craftbukkit.jar:git-Spigot-b73910a-726656b]
	at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[craftbukkit.jar:git-Spigot-b73910a-726656b]
	at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [craftbukkit.jar:git-Spigot-b73910a-726656b]
	at org.bukkit.craftbukkit.v1_8_R1.CraftServer.loadPlugins(CraftServer.java:291) [craftbukkit.jar:git-Spigot-b73910a-726656b]
	at net.minecraft.server.v1_8_R1.DedicatedServer.init(DedicatedServer.java:152) [craftbukkit.jar:git-Spigot-b73910a-726656b]
	at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:505) [craftbukkit.jar:git-Spigot-b73910a-726656b]
	at java.lang.Thread.run(Thread.java:745) [?:1.7.0_75]
Caused by: java.lang.NoClassDefFoundError: net/minecraft/server/v1_8_R2/Packet
	at java.lang.Class.forName0(Native Method) ~[?:1.7.0_75]
	at java.lang.Class.forName(Class.java:274) ~[?:1.7.0_75]
	at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64) ~[craftbukkit.jar:git-Spigot-b73910a-726656b]
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[craftbukkit.jar:git-Spigot-b73910a-726656b]
	... 6 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_8_R2.Packet
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:91) ~[craftbukkit.jar:git-Spigot-b73910a-726656b]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[craftbukkit.jar:git-Spigot-b73910a-726656b]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:425) ~[?:1.7.0_75]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ~[?:1.7.0_75]
	at java.lang.Class.forName0(Native Method) ~[?:1.7.0_75]
	at java.lang.Class.forName(Class.java:274) ~[?:1.7.0_75]
	at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64) ~[craftbukkit.jar:git-Spigot-b73910a-726656b]
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[craftbukkit.jar:git-Spigot-b73910a-726656b]
	... 6 more
[11:48:23 INFO]: [WorldEdit] Loading WorldEdit v5.6.3
[11:48:23 INFO]: [NoCheatPlus] Loading NoCheatPlus v3.11.1-RC-sMD5NET-b743
[11:48:23 INFO]: [NoSwear] Loading NoSwear v6.2