Помогите Падает сервер

Падает сервер на MCPC+
Ошибка:

Код:

2013-03-10 17:18:55 [SEVERE] t: Exception ticking world
2013-03-10 17:18:55 [SEVERE] at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:951)
2013-03-10 17:18:55 [SEVERE] at ho.r(DedicatedServer.java:309)
2013-03-10 17:18:55 [SEVERE] at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:857)
2013-03-10 17:18:55 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:744)
2013-03-10 17:18:55 [SEVERE] at fy.run(ThreadMinecraftServer.java:16)
2013-03-10 17:18:55 [SEVERE] Caused by: java.lang.NullPointerException
2013-03-10 17:18:55 [SEVERE] at in.a(WorldServer.java:1284)
2013-03-10 17:18:55 [SEVERE] at in.V(WorldServer.java:1264)
2013-03-10 17:18:55 [SEVERE] at in.b(WorldServer.java:306)
2013-03-10 17:18:55 [SEVERE] at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:945)
2013-03-10 17:18:55 [SEVERE] ... 4 more
2013-03-10 17:18:55 [SEVERE] Encountered an unexpected exception t
t: Exception ticking world
    at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:951)
    at ho.r(DedicatedServer.java:309)
    at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:857)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:744)
    at fy.run(ThreadMinecraftServer.java:16)
Caused by: java.lang.NullPointerException
    at in.a(WorldServer.java:1284)
    at in.V(WorldServer.java:1264)
    at in.b(WorldServer.java:306)
    at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:945)
    ... 4 more

Как быть?