Server Crash, Please help!

[News55]

Server running on Voltz 1.0.12

Here's what happens once someone loggins:

2013-02-07 09:55:19 [iNFO] [Minecraft] There are 1/6 players online:

2013-02-07 09:55:19 [iNFO] [Minecraft] sg6nightstalker

2013-02-07 09:55:19 [iNFO] [sTDERR] java.lang.NoClassDefFoundError: l

2013-02-07 09:55:19 [iNFO] [sTDERR] at a.<init>(CrashReport.java:27)

2013-02-07 09:55:19 [iNFO] [sTDERR] at a.a(CrashReport.java:319)

2013-02-07 09:55:19 [iNFO] [sTDERR] at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:673)

2013-02-07 09:55:19 [iNFO] [sTDERR] at ho.r(DedicatedServer.java:269)

2013-02-07 09:55:19 [iNFO] [sTDERR] at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:599)

2013-02-07 09:55:19 [iNFO] [sTDERR] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497)

2013-02-07 09:55:19 [iNFO] [sTDERR] at fy.run(SourceFile:849)

2013-02-07 09:55:19 [sEVERE] [Minecraft] Encountered an unexpected exception NoClassDefFoundError

java.lang.NoClassDefFoundError: l

at a.<init>(CrashReport.java:27)

at a.a(CrashReport.java:319)

at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:673)

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)

2013-02-07 09:55:19 [iNFO] [Minecraft] Stopping server

2013-02-07 09:55:19 [iNFO] [Minecraft] Saving players

2013-02-07 09:55:19 [iNFO] [sTDERR] java.net.SocketException: Socket closed

2013-02-07 09:55:19 [iNFO] [sTDERR] at java.net.PlainSocketImpl.socketAccept(Native Method)

2013-02-07 09:55:19 [iNFO] [sTDERR] at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:398)

2013-02-07 09:55:19 [iNFO] [sTDERR] at java.net.ServerSocket.implAccept(ServerSocket.java:522)

2013-02-07 09:55:19 [iNFO] [sTDERR] at java.net.ServerSocket.accept(ServerSocket.java:490)

2013-02-07 09:55:19 [iNFO] [sTDERR] at hu.run(ServerListenThread.java:81)

2013-02-07 09:55:19 [iNFO] [sTDOUT] Closing listening thread

2013-02-07 09:55:19 [iNFO] [Minecraft] Saving worlds

2013-02-07 09:55:19 [iNFO] [Minecraft] Saving chunks for level 'BaconCraft'/Overworld

2013-02-07 09:55:20 [iNFO] [Minecraft] Saving chunks for level 'BaconCraft'/Nether

2013-02-07 09:55:20 [iNFO] [Minecraft] Saving chunks for level 'BaconCraft'/The End

2013-02-07 09:55:21 [iNFO] [ForgeModLoader] Unloading dimension 0

2013-02-07 09:55:21 [iNFO] [ForgeModLoader] Unloading dimension -1

2013-02-07 09:55:21 [iNFO] [ForgeModLoader] Unloading dimension 1

2013-02-07 09:55:21 [sEVERE] [ForgeModLoader] Fatal errors were detected during the transition from SERVER_STARTED to SERVER_STOPPED. Loading cannot continue

2013-02-07 09:55:21 [sEVERE] [ForgeModLoader]

mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available->Available

FML [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available->Available

Forge [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available->Available

2013-02-07 09:55:21 [sEVERE] [ForgeModLoader] The following problems were captured during this phase

2013-02-07 09:55:21 [iNFO] [sTDERR] Exception in thread "Server thread" cpw.mods.fml.common.LoaderException

2013-02-07 09:55:21 [iNFO] [sTDERR] at cpw.mods.fml.common.LoadController.transition(LoadController.java:117)

2013-02-07 09:55:21 [iNFO] [sTDERR] at cpw.mods.fml.common.Loader.serverStopped(Loader.java:761)

2013-02-07 09:55:21 [iNFO] [sTDERR] at cpw.mods.fml.common.FMLCommonHandler.handleServerStopped(FMLCommonHandler.java:464)

2013-02-07 09:55:21 [iNFO] [sTDERR] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:559)

2013-02-07 09:55:21 [iNFO] [sTDERR] at fy.run(SourceFile:849)

[XboxFest]

Yea me too