PrisonRankup Errors 1.7v

[15:02:22 INFO]: [PrisonRankup] Enabling PrisonRankup v1.7
[15:02:22 ERROR]: Error occurred while enabling PrisonRankup v1.7 (Is it up to d
ate?)
org.bukkit.plugin.IllegalPluginAccessException: Unable to find handler list for
event net.craftservers.prisonrankup.GroupAddEvent
        at org.bukkit.plugin.SimplePluginManager.getRegistrationClass(SimplePlug
inManager.java:585) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnk
s]
        at org.bukkit.plugin.SimplePluginManager.registerEvents(SimplePluginMana
ger.java:527) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
        at net.craftservers.prisonrankup.Main.onEnable(Main.java:62) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:250) ~[c
raftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader
.java:324) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManage
r.java:404) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
        at org.bukkit.craftbukkit.v1_7_R3.CraftServer.loadPlugin(CraftServer.jav
a:441) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
        at org.bukkit.craftbukkit.v1_7_R3.CraftServer.enablePlugins(CraftServer.
java:375) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.n(MinecraftServer.java:3
52) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.g(MinecraftServer.java:3
26) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.a(MinecraftServer.java:2
82) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
        at net.minecraft.server.v1_7_R3.DedicatedServer.init(DedicatedServer.jav
a:182) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java
:436) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]
        at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:6
28) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-21-g1ab090e-b3050jnks]