Quand je commence a ouvrir une partie minecraft pixelmon je commence a choisir le pokémon et puis le jeu crash quand je clique sur l'un des quatres pokémon et sa m'affiche :
---- Minecraft Crash Report ----
// I let you down. Sorry

Time: 22/09/13 15:54
Description: Ticking memory connection

java.lang.NullPointerException
at pixelmon.entities.pixelmon.stats.Level.getExpForLe
vel(Level.java:81)

at pixelmon.entities.pixelmon.stats.Level.setLevel(Le
vel.java:64)

at pixelmon.comm.packetHandlers.ChooseStarter.handleP
acket(ChooseStarter.java:31)

at pixelmon.comm.PacketHandler.onPacketData(PacketHan
dler.java:55)

at cpw.mods.fml.common.network.NetworkRegistry.handle
Packet(NetworkRegistry.java:255)

at cpw.mods.fml.common.network.NetworkRegistry.handle
CustomPacket(NetworkRegistry.java:245)

at cpw.mods.fml.common.network.FMLNetworkHandler.hand
lePacket250Packet(FMLNetworkHandler.java:84)

at net.minecraft.network.NetServerHandler.func_72501_
a(NetServerHandler.java:1111)

at net.minecraft.network.packet.Packet250CustomPayloa
d.func_73279_a(SourceFile:61)

at net.minecraft.network.MemoryConnection.func_74428_
b(MemoryConnection.java:89)

at net.minecraft.network.NetServerHandler.func_72570_
d(NetServerHandler.java:141)

at net.minecraft.network.NetworkListenThread.func_717
47_b(NetworkListenThread.java:54)

at net.minecraft.server.integrated.IntegratedServerLi
stenThread.func_71747_b(IntegratedServerListenThre
ad.java:109)

at net.minecraft.server.MinecraftServer.func_71190_q(
MinecraftServer.java:689)

at net.minecraft.server.MinecraftServer.func_71217_p(
MinecraftServer.java:585)

at net.minecraft.server.integrated.IntegratedServer.f
unc_71217_p(IntegratedServer.java:129)

at net.minecraft.server.MinecraftServer.run(Minecraft
Server.java:482)

at net.minecraft.server.ThreadMinecraftServer.run(Sou
rceFile:582)

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

-- Head --
Stacktrace:
at pixelmon.entities.pixelmon.stats.Level.getExpForLe
vel(Level.java:81)

at pixelmon.entities.pixelmon.stats.Level.setLevel(Le
vel.java:64)

at pixelmon.comm.packetHandlers.ChooseStarter.handleP
acket(ChooseStarter.java:31)

at pixelmon.comm.PacketHandler.onPacketData(PacketHan
dler.java:55)

at cpw.mods.fml.common.network.NetworkRegistry.handle
Packet(NetworkRegistry.java:255)

at cpw.mods.fml.common.network.NetworkRegistry.handle
CustomPacket(NetworkRegistry.java:245)

at cpw.mods.fml.common.network.FMLNetworkHandler.hand
lePacket250Packet(FMLNetworkHandler.java:84)

at net.minecraft.network.NetServerHandler.func_72501_
a(NetServerHandler.java:1111)

at net.minecraft.network.packet.Packet250CustomPayloa
d.func_73279_a(SourceFile:61)

at net.minecraft.network.MemoryConnection.func_74428_
b(MemoryConnection.java:89)

at net.minecraft.network.NetServerHandler.func_72570_
d(NetServerHandler.java:141)

-- Ticking connection --
Details:
Connection: net.minecraft.network.NetServerHandler@a3ab9b
Stacktrace:
at net.minecraft.network.NetworkListenThread.func_717
47_b(NetworkListenThread.java:54)

at net.minecraft.server.integrated.IntegratedServerLi
stenThread.func_71747_b(IntegratedServerListenThre
ad.java:109)

at net.minecraft.server.MinecraftServer.func_71190_q(
MinecraftServer.java:689)

at net.minecraft.server.MinecraftServer.func_71217_p(
MinecraftServer.java:585)

at net.minecraft.server.integrated.IntegratedServer.f
unc_71217_p(IntegratedServer.java:129)

at net.minecraft.server.MinecraftServer.run(Minecraft
Server.java:482)

at net.minecraft.server.ThreadMinecraftServer.run(Sou
rceFile:582)

-- System Details --
Details:
Minecraft Version: 1.6.2
Operating System: Windows 8 (x86) version 6.2
Java Version: 1.7.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
Memory: 68082496 bytes (64 MB) / 259522560 bytes (247 MB) up to 259522560 bytes (247 MB)
JVM Flags: 1 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerfor
mance_javaw.exe_minecraft.exe.heapdump

AABB Pool Size: 2320 (129920 bytes; 0 MB) allocated, 2085 (116760 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 71
FML: MCP v8.04 FML v6.2.62.871 Minecraft Forge 9.10.1.871 8 mods loaded, 8 mods active
mcp{8.04} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available

FML{6.2.62.871} [Forge Mod Loader] (minecraftforge-9.10.1.871.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available

Forge{9.10.1.871} [Minecraft Forge] (minecraftforge-9.10.1.871.jar) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available

mod_bspkrsCore{v3.04(1.6.2)} [bspkrsCore] ([1.6.2]bspkrsCorev3.04.zip) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available

FloatingRuins{Forge 1.6.2.r03} [FloatingRuins] ([1.6.2]FloatingRuins.Forge.1.6.2.r03.Universal.zi
p)
Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available

cfm{2.9} [§bMrCrayfish's Furniture Mod] (Furniture.zip) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available

pixelmon{2.3.1} [Pixelmon] (mods pixelmon) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available

RopesPlus{1.4.6} [Ropes+] (RopePlus_1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialize
d->Post-initialized->Available->Available->Availab
le->Available

Profiler Position: N/A (disabled)
Vec3 Pool Size: 271 (15176 bytes; 0 MB) allocated, 267 (14952 bytes; 0 MB) used
Player Count: 1 / 8; [EntityPlayerMP['lucas15300'/28, l='Pixelmon', x=378,50, y=77,00, z=218,50]]
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'