adv tab list error

[16:22:59] [Server thread/ERROR]: Could not load 'plugins/AdvancedTabList.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: net/minecraft/server/v1_7_R4/Packet
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:135) ~[custom.jar:git-Spigot-b8f6402-a646500]
	at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[custom.jar:git-Spigot-b8f6402-a646500]
	at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [custom.jar:git-Spigot-b8f6402-a646500]
	at org.bukkit.craftbukkit.v1_8_R1.CraftServer.loadPlugins(CraftServer.java:288) [custom.jar:git-Spigot-b8f6402-a646500]
	at net.minecraft.server.v1_8_R1.DedicatedServer.init(DedicatedServer.java:152) [custom.jar:git-Spigot-b8f6402-a646500]
	at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:494) [custom.jar:git-Spigot-b8f6402-a646500]
	at java.lang.Thread.run(Unknown Source) [?:1.7.0_55]
Caused by: java.lang.NoClassDefFoundError: net/minecraft/server/v1_7_R4/Packet
	at java.lang.Class.forName0(Native Method) ~[?:1.7.0_55]
	at java.lang.Class.forName(Unknown Source) ~[?:1.7.0_55]
	at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64) ~[custom.jar:git-Spigot-b8f6402-a646500]
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[custom.jar:git-Spigot-b8f6402-a646500]
	... 6 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_7_R4.Packet
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:91) ~[custom.jar:git-Spigot-b8f6402-a646500]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[custom.jar:git-Spigot-b8f6402-a646500]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_55]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_55]
	at java.lang.Class.forName0(Native Method) ~[?:1.7.0_55]
	at java.lang.Class.forName(Unknown Source) ~[?:1.7.0_55]
	at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64) ~[custom.jar:git-Spigot-b8f6402-a646500]
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[custom.jar:git-Spigot-b8f6402-a646500]
	... 6 more