SuperSpleef - NullPointerException

11:33:26 [INFO] [SuperSpleef] Enabling SuperSpleef vB 0.1.7
11:33:26 [INFO] [Spleef] Loading 3 games
11:33:26 [INFO] [Spleef]Checking for arena on index 1
11:33:26 [INFO] Loading Arena: 1
11:33:26 [INFO] Loaded 900/1125 blocks into the floor of Spleef arena 1
11:33:26 [INFO] 1 Enabling!
11:33:26 [INFO] [Spleef]Checking for arena on index 2
11:33:26 [INFO] Loading Arena: 2
11:33:26 [SEVERE] Error occurred while enabling SuperSpleef vB 0.1.7 (Is it up t
o date?)
java.lang.NullPointerException
        at org.mcsg.double0negative.spleef.Game.loadFloor(Game.java:156)
        at org.mcsg.double0negative.spleef.Game.loadGame(Game.java:87)
        at org.mcsg.double0negative.spleef.Game.setup(Game.java:70)
        at org.mcsg.double0negative.spleef.Game.<init>(Game.java:65)
        at org.mcsg.double0negative.spleef.GameManager.LoadGames(GameManager.jav
a:62)
        at org.mcsg.double0negative.spleef.GameManager.setup(GameManager.java:31
)
        at org.mcsg.double0negative.spleef.Spleef.onEnable(Spleef.java:34)
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217)
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader
.java:457)
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManage
r.java:381)
        at org.bukkit.craftbukkit.v1_6_R2.CraftServer.loadPlugin(CraftServer.jav
a:282)
        at org.bukkit.craftbukkit.v1_6_R2.CraftServer.enablePlugins(CraftServer.
java:264)
        at net.minecraft.server.v1_6_R2.MinecraftServer.l(MinecraftServer.java:3
13)
        at net.minecraft.server.v1_6_R2.MinecraftServer.f(MinecraftServer.java:2
90)
        at net.minecraft.server.v1_6_R2.MinecraftServer.a(MinecraftServer.java:2
50)
        at net.minecraft.server.v1_6_R2.DedicatedServer.init(DedicatedServer.jav
a:151)
        at net.minecraft.server.v1_6_R2.MinecraftServer.run(MinecraftServer.java
:391)
        at net.minecraft.server.v1_6_R2.ThreadServerApplication.run(SourceFile:5
82)