MobArena server log

22:36:59 [INFO] [MobArena] Enabling MobArena v0.94.4.52
22:36:59 [SEVERE] Error occurred while enabling MobArena v0.94.4.52 (Is it up to
 date?)
java.lang.NumberFormatException: For input string: "2; 20"
        at java.lang.NumberFormatException.forInputString(Unknown Source)
        at java.lang.Integer.parseInt(Unknown Source)
        at java.lang.Short.parseShort(Unknown Source)
        at java.lang.Short.parseShort(Unknown Source)
        at com.garbagemule.MobArena.util.ItemParser.getData(ItemParser.java:196)

        at com.garbagemule.MobArena.util.ItemParser.withDataAndAmount(ItemParser
.java:153)
        at com.garbagemule.MobArena.util.ItemParser.parseItem(ItemParser.java:12
5)
        at com.garbagemule.MobArena.util.ItemParser.parseItems(ItemParser.java:9
8)
        at com.garbagemule.MobArena.ArenaMasterImpl.loadClass(ArenaMasterImpl.ja
va:306)
        at com.garbagemule.MobArena.ArenaMasterImpl.loadClasses(ArenaMasterImpl.
java:277)
        at com.garbagemule.MobArena.ArenaMasterImpl.initialize(ArenaMasterImpl.j
ava:233)
        at com.garbagemule.MobArena.MobArena.onEnable(MobArena.java:81)
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:215)
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader
.java:337)
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManage
r.java:381)
        at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:256)
        at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:238
)
        at net.minecraft.server.MinecraftServer.t(MinecraftServer.java:381)
        at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:368)
        at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:197)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:432)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)