Crash serveur minecraft

Bonjour, je possédais un serveur bukkit qui fonctionnait à la perfections avec plugins. Malheureusement mon pc c'est pris un virus et j'ai du le réinitialiser. Heureusement j'ai réussi à sauver quelques dossier dont mon serveur. Mais maintenant que je le remet en route il me met [Grave]...... et quand je l'éteint il m’envoie un rapport de crash. Pourriez vous me dire ce que je dois faire svp.

---- Minecraft Crash Report ----
// Daisy, daisy...

Time: 20/04/14 17:52
Description: Exception in server tick loop

java.lang.NullPointerException
at net.minecraft.server.v1_6_R3.DedicatedServer.as(DedicatedServer.java:259)
at net.minecraft.server.v1_6_R3.DedicatedServer.a(DedicatedServer.java:205)
at net.minecraft.server.v1_6_R3.MinecraftServer.run(MinecraftServer.java:428)
at net.minecraft.server.v1_6_R3.ThreadServerApplication.run(SourceFile:583)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
Minecraft Version: 1.6.4
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_55, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 986664488 bytes (940 MB) / 1029701632 bytes (982 MB) up to 1029701632 bytes (982 MB)
JVM Flags: 2 total; -Xmx1024M -Xms1024M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: [net.minecraft.server.v1_6_R3.ICommandListener, IMojangStatistics, ICommandHandler, ...], [org.bukkit.BlockChangeDelegate, World, Server], [org.bukkit.block.BlockState], [org.bukkit.command.CommandSender, RemoteConsoleCommandSender], [org.bukkit.configuration.serialization.ConfigurationSerializable], [org.bukkit.craftbukkit.Main], [org.bukkit.craftbukkit.libs.jline.TerminalFactory, Terminal, Flavor, ...], [org.bukkit.craftbukkit.libs.jline.console.ConsoleReader, CursorBuffer, ConsoleKeys, ...], [org.bukkit.craftbukkit.libs.jline.console.completer.CompletionHandler, CandidateListCompletionHandler], [org.bukkit.craftbukkit.libs.jline.console.history.History, MemoryHistory], [org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader, Configuration, Log], [org.bukkit.craftbukkit.v1_6_R3.LoggerOutputStream, CraftServer], [org.bukkit.craftbukkit.v1_6_R3.inventory.CraftItemStack, CraftRecipe, CraftShapedRecipe, ...], [org.bukkit.craftbukkit.v1_6_R3.potion.CraftPotionEffectType], [org.bukkit.craftbukkit.v1_6_R3.util.ServerShutdownThread, Waitable, TerminalConsoleHandler, ...], [org.bukkit.entity.Entity], [org.bukkit.event.Event, Cancellable, HandlerList, ...], [org.bukkit.event.block.BlockEvent, BlockFadeEvent, BlockGrowEvent, ...], [org.bukkit.event.entity.EntityEvent, EntityInteractEvent, EntityDamageEvent, ...], [org.bukkit.event.hanging.HangingEvent, HangingPlaceEvent], [org.bukkit.event.inventory.InventoryMoveItemEvent], [org.bukkit.event.painting.PaintingEvent, PaintingPlaceEvent], [org.bukkit.event.player.PlayerEvent, PlayerFishEvent], [org.bukkit.event.server.ServerEvent, MapInitializeEvent, ServerCommandEvent], [org.bukkit.event.world.WorldEvent, WorldInitEvent, WorldSaveEvent, ...], [org.bukkit.inventory.ItemStack, Inventory, Recipe, ...], [org.bukkit.map.MapView], [org.bukkit.metadata.Metadatable], [org.bukkit.permissions.ServerOperator, Permissible], [org.bukkit.plugin.messaging.PluginMessageRecipient], [org.bukkit.potion.PotionEffectType, PotionEffectTypeWrapper], [org.fusesource.hawtjni.runtime.Library], [org.fusesource.jansi.AnsiOutputStream, WindowsAnsiOutputStream, AnsiConsole, ...], [org.fusesource.jansi.internal.Kernel32, CONSOLE_SCREEN_BUFFER_INFO, COORD, ...]
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
CraftBukkit Information:
Running:
Failed to handle CraftCrashReport:
java.lang.NullPointerException
at org.bukkit.Bukkit.getName(Bukkit.java:72)
at org.bukkit.craftbukkit.v1_6_R3.CraftCrashReport.call(CraftCrashReport.java:20)
at net.minecraft.server.v1_6_R3.CrashReportSystemDetails.a(SourceFile:74)
at net.minecraft.server.v1_6_R3.CrashReport.h(CrashReport.java:41)
at net.minecraft.server.v1_6_R3.CrashReport.<init>(CrashReport.java:28)
at net.minecraft.server.v1_6_R3.MinecraftServer.run(MinecraftServer.java:438)
at net.minecraft.server.v1_6_R3.ThreadServerApplication.run(SourceFile:583)

Profiler Position: N/A (disabled)
Is Modded: Definitely; Server brand changed to 'craftbukkit'
Type: Dedicated Server (map_server.txt)