quant je suit sur le serveur on solo sa marche et des qu'on et deux sa crash
le Crash Report:
---- Minecraft Crash Report ----
// Why is it breaking 
Time: 19/07/14 13:15
Description: Exception in server tick loop
java.lang.NoClassDefFoundError: net/minecraft/world/World$2
at net.minecraft.world.World.func_147460_e(World.java
:691)
at net.minecraft.world.World.func_147459_d(World.java
:628)
at net.minecraft.world.World.func_147444_c(World.java
:590)
at net.minecraft.world.World.func_147465_d(World.java
:456)
at net.minecraft.item.ItemBlock.placeBlockAt(ItemBloc
k.java:206)
at net.minecraft.item.ItemBlock.func_77648_a(ItemBloc
k.java:103)
at net.minecraft.item.ItemStack.func_77943_a(ItemStac
k.java:126)
at net.minecraft.server.management.ItemInWorldManager
.func_73078_a(ItemInWorldManager.java:385)
at net.minecraft.network.NetHandlerPlayServer.func_14
7346_a(NetHandlerPlayServer.java:551)
at net.minecraft.network.play.client.C08PacketPlayerB
lockPlacement.func_148833_a(SourceFile:60)
at net.minecraft.network.play.client.C08PacketPlayerB
lockPlacement.func_148833_a(SourceFile:9)
at net.minecraft.network.NetworkManager.func_74428_b(
NetworkManager.java:197)
at net.minecraft.network.NetworkSystem.func_151269_c(
NetworkSystem.java:165)
at net.minecraft.server.MinecraftServer.func_71190_q(
MinecraftServer.java:644)
at net.minecraft.server.dedicated.DedicatedServer.fun
c_71190_q(DedicatedServer.java:326)
at net.minecraft.server.MinecraftServer.func_71217_p(
MinecraftServer.java:531)
at net.minecraft.server.MinecraftServer.run(Minecraft
Server.java:414)
at net.minecraft.server.MinecraftServer$2.run(Minecra
ftServer.java:670)
A detailed walkthrough of the error, its code path and all known details is as follows:
--------------------------------------------------
-------------------------------------
-- System Details --
Details:
Minecraft Version: 1.7.2
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.7.0_65, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 66257752 bytes (63 MB) / 222814208 bytes (212 MB) up to 1067057152 bytes (1017 MB)
JVM Flags: 2 total; -Xincgc -Xmx1G
AABB Pool Size: 4171 (233576 bytes; 0 MB) allocated, 3856 (215936 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 96
FML: MCP v9.03 FML v7.2.217.1147 28 mods loaded, 28 mods active
mcp{9.03} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
FML{7.2.217.1147} [Forge Mod Loader] (forge-universal.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
Forge{10.12.2.1147} [Minecraft Forge] (forge-universal.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
simpleores{1.4.0} [SimpleOres 2] ([1.7.2] SimpleOres 2 + Fusion v1.4.0.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
fusionplugin{1.4.0} [SimpleOres 2 Fusion Plugin] ([1.7.2] SimpleOres 2 + Fusion v1.4.0.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
mod.ymt.air.HariboteAirCraft{172v2 hiten} [HariboteAirCraft] (AirCraft-Mod-1.7.2.zip) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
BuildCraft|Core{6.0.16} [BuildCraft] (buildcraft-6.0.16.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
BuildCraft|Builders{6.0.16} [BC Builders] (buildcraft-6.0.16.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
BuildCraft|Energy{6.0.16} [BC Energy] (buildcraft-6.0.16.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
BuildCraft|Factory{6.0.16} [BC Factory] (buildcraft-6.0.16.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
BuildCraft|Transport{6.0.16} [BC Transport] (buildcraft-6.0.16.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
BuildCraft|Silicon{6.0.16} [BC Silicon] (buildcraft-6.0.16.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
chisel{1.5.4b} [Chisel] (Chisel-1.7.2-1.5.4b.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
ForgeMultipart{1.1.0.294} [Forge Multipart] (ForgeMultipart-1.7.2-1.1.0.294-universal.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
McMultipart{1.1.0.294} [Minecraft Multipart Plugin] (ForgeMultipart-1.7.2-1.1.0.294-universal.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
iChunUtil{3.3.0} [iChunUtil] (iChunUtil-3.3.0.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
Hats{3.0.0} [Hats] (Hats-Mod-1.7.2.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
inventorytweaks{1.57-116} [Inventory Tweaks] (Inventory-Tweaks-Mod-1.7.2.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
MoreFurnaces{1.3.6} [More Furnaces] (MoreFurnaces-1.3.6-MC1.7.2.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
moreNature{0.6.0} [More Nature] (morenature-0.6.0.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
Morph{0.8.0} [Morph] (Morphing-Mod-1.7.2.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
cfm{3.3.2} [§6MrCrayfish's Furniture Mod] (MrCrayfishFurnitureModv3.3.2(1.7.2).jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
secretroomsmod{@VERSION@} [The SecretRoomsMod] (Secret-Rooms-Mod-1.7.2.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
securitycraft{v1.5.11} [SecurityCraft] (SecurityCraft v1.5.11 for 1.7.2.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
starmall{1.0} [StarMall] (Star-Mall-Mod-1.7.2.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
stillhungry{1.7.2-2.1.0} [Still Hungry!] (stillhungry-1.7.2-2.1.1.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
warpbook{0.0.202} [Warp Book] (Warp-Book-Mod-1.7.2.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
ForgeMicroblock{1.1.0.294} [Forge Microblocks] (ForgeMultipart-1.7.2-1.1.0.294-universal.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available
Profiler Position: N/A (disabled)
Vec3 Pool Size: 603 (33768 bytes; 0 MB) allocated, 569 (31864 bytes; 0 MB) used
Player Count: 2 / 5; [EntityPlayerMP['lyorom'/338, l='world', x=-401,90, y=84,00, z=451,70], EntityPlayerMP['LilyPlus'/2517, l='world', x=-399,97, y=86,50, z=442,47]]
Is Modded: Definitely; Server brand changed to 'fml,forge'
Type: Dedicated Server (map_server.txt)
Mercie pour l'aide 
