[23:02:25 INFO]: [DuelMe] Enabling DuelMe v0.9.9 Beta
[23:02:25 INFO]: [DuelMe] [Info] Enabling.
[23:02:25 ERROR]: Error occurred while enabling DuelMe v0.9.9 Beta (Is it up to date?)
java.lang.NoSuchMethodError: org.bukkit.scheduler.BukkitScheduler.runTask(Lorg/bukkit/plugin/Plugin;Lorg/bukkit/scheduler/BukkitRunnable;)Lorg/bukkit/scheduler/BukkitTask;
        at com.teozcommunity.teozfrank.duelme.main.DuelMe.checkForUpdates(DuelMe.java:138) ~[?:?]
        at com.teozcommunity.teozfrank.duelme.main.DuelMe.onEnable(DuelMe.java:87) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:316) ~[spigot.jar:git-Spigot-1486]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:324) [spigot.jar:git-Spigot-1486]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [spigot.jar:git-Spigot-1486]
        at org.bukkit.craftbukkit.v1_7_R3.CraftServer.loadPlugin(CraftServer.java:465) [spigot.jar:git-Spigot-1486]
        at org.bukkit.craftbukkit.v1_7_R3.CraftServer.enablePlugins(CraftServer.java:383) [spigot.jar:git-Spigot-1486]
        at net.minecraft.server.v1_7_R3.MinecraftServer.n(MinecraftServer.java:359) [spigot.jar:git-Spigot-1486]
        at net.minecraft.server.v1_7_R3.MinecraftServer.g(MinecraftServer.java:333) [spigot.jar:git-Spigot-1486]
        at net.minecraft.server.v1_7_R3.MinecraftServer.a(MinecraftServer.java:289) [spigot.jar:git-Spigot-1486]
        at net.minecraft.server.v1_7_R3.DedicatedServer.init(DedicatedServer.java:193) [spigot.jar:git-Spigot-1486]
        at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:457) [spigot.jar:git-Spigot-1486]
        at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [spigot.jar:git-Spigot-1486]