PVPARENA errors! :(

13:36:52 [INFO] [PVP Arena] Permissions plugin not found, defaulting to OP.
13:36:52 [INFO] [PVP Arena] Spout not found, you are missing some features ;)
13:36:52 [SEVERE] java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String
13:36:52 [SEVERE]       at net.slipcor.pvparena.managers.ConfigManager.configParse(ConfigManager.java:121)
13:36:52 [SEVERE]       at net.slipcor.pvparena.arenas.Arena.<init>(Arena.java:160)
13:36:52 [SEVERE]       at net.slipcor.pvparena.arenas.TeamArena.<init>(TeamArena.java:29)
13:36:52 [SEVERE]       at net.slipcor.pvparena.managers.ArenaManager.loadArena(ArenaManager.java:104)
13:36:52 [SEVERE]       at net.slipcor.pvparena.managers.ArenaManager.load_arenas(ArenaManager.java:50)
13:36:52 [SEVERE]       at net.slipcor.pvparena.PVPArena.load_config(PVPArena.java:293)
13:36:52 [SEVERE]       at net.slipcor.pvparena.PVPArena.onEnable(PVPArena.java:139)
13:36:52 [SEVERE]       at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:228)
13:36:52 [SEVERE]       at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:970)
13:36:52 [SEVERE]       at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:280)
13:36:52 [SEVERE]       at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:186)
13:36:52 [SEVERE]       at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:169)
13:36:52 [SEVERE]       at net.minecraft.server.MinecraftServer.t(MinecraftServer.java:348)
13:36:52 [SEVERE]       at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:335)
13:36:52 [SEVERE]       at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:165)
13:36:52 [SEVERE]       at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:399)
13:36:52 [SEVERE]       at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)
13:36:53 [INFO] [PVP Arena] enabled (version v0.5.6.4)
13:36:53 [INFO] [PVP Arena] <3 iConomy