Schnelle Hilfe gesucht!!

2011-03-19 09:45:41 [INFO] Stopping server
2011-03-19 09:51:18 [INFO] Starting minecraft server version Beta 1.3
2011-03-19 09:51:18 [INFO] Loading properties
2011-03-19 09:51:18 [INFO] Starting Minecraft server on 5.175.65.219:25565
2011-03-19 09:51:18 [WARNING] **** SERVER IS RUNNING IN OFFLINE/INSECURE MODE!
2011-03-19 09:51:18 [WARNING] The server will make no attempt to authenticate usernames. Beware.
2011-03-19 09:51:18 [WARNING] While this makes the game possible to play without internet access, it also opens up the ability for hackers to connect with any username they choose.
2011-03-19 09:51:18 [WARNING] To change this, set "online-mode" to "true" in the server.settings file.
2011-03-19 09:51:18 [INFO] Preparing level "world"
2011-03-19 09:51:18 [INFO] Preparing start region
2011-03-19 09:51:18 [SEVERE] Unexpected exception
java.lang.NullPointerException
	at cv.b(SourceFile:72)
	at cp.a(SourceFile:1565)
	at gd.d(SourceFile:461)
	at fz.d(SourceFile:66)
	at fz.b(SourceFile:87)
	at cp.c(SourceFile:302)
	at cp.a(SourceFile:259)
	at cp.e(SourceFile:263)
	at cp.a(SourceFile:200)
	at mn.a(SourceFile:51)
	at cp.<init>(SourceFile:166)
	at cv.<init>(SourceFile:25)
	at net.minecraft.server.MinecraftServer.a(SourceFile:169)
	at net.minecraft.server.MinecraftServer.d(SourceFile:134)
	at net.minecraft.server.MinecraftServer.run(SourceFile:237)
	at bc.run(SourceFile:366)