Myscraft - Internal Service Error

[Jancarius]

I made a dimension in Mystcraft, but when I went into it, it crashed the server. I now can't log into the server, and get an internal server error (below). What other information can I use to diagnose it, and is it possible to fix without just deleting the account out of the server and resetting myself (which I'd prefer not to do, because I'd need to recreate my thaumcraft progress, but better than not playing).

[WARNING] Failed to handle packet for Jancarius [/71.252.190.6:1024]: java.lang.NullPointerException
java.lang.NullPointerException
at gm.a(ServerConfigurationManager.java:114)
at it.completeConnection(NetLoginHandler.java:198)
at cpw.mods.fml.common.network.FMLNetworkHandler.handleClientConnection(FMLNetworkHandler.java:153)
at cpw.mods.fml.common.network.FMLNetworkHandler.onConnectionReceivedFromClient(FMLNetworkHandler.java:107)
at it.d(NetLoginHandler.java:182)
at it.c(NetLoginHandler.java:75)
at hu.a(ServerListenThread.java:56)
at ht.b(SourceFile:29)
at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:703)
at ho.r(DedicatedServer.java:269)
at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:599)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497)
at fy.run(SourceFile:849)

 

[pauldemonkey]

Are you the admin of the server? i have had problems with players crashing in a corrupt-like area and their character is still in the server for a while. If that is the case you can just have an admin tp you out of that area to them or spawn.