Crash Aether II

Bonjour,

Je viens d'isltaller le Mob Aether II mais il crash dès que je tente de jouer en solo, voici le rapport :

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Minecraft has crashed!
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Minecraft has stopped running because it encountered a problem; Exception in server tick loop

A full error report has been saved to /Users/caroline/Library/Application Support/minecraft/crash-reports/crash-2013-09-04_11.35.47-server.txt - Please include a copy of that file (Not this screen!) if you report this crash to anyone; without it, they will not be able to help fix the crash :(



--- BEGIN ERROR REPORT 58173f1d --------
Full report at:
/Users/caroline/Library/Application Support/minecraft/crash-reports/crash-2013-09-04_11.35.47-server.txt
Please show that file to Mojang, NOT just this screen!

Generated 04/09/13 11:35

-- System Details --
Details:
Minecraft Version: 1.5.2
Operating System: Mac OS X (x86_64) version 10.7.5
Java Version: 1.6.0_51, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 419275560 bytes (399 MB) / 581435392 bytes (554 MB) up to 1065025536 bytes (1015 MB)
JVM Flags: 3 total; -Xbootclasspath/a:/System/Library/PrivateFrameworks/JavaApplicationLauncher.framework/Resources/LauncherSupport.jar -Xms512M -Xmx1024M
AABB Pool Size: 1916 (107296 bytes; 0 MB) allocated, 1916 (107296 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 2, tcache: 0, allocated: 1, tallocated: 63
FML: MCP v7.51 FML v5.2.2.684 Minecraft Forge 7.8.0.684 5 mods loaded, 5 mods active
mcp{7.44} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML{5.2.2.684} [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge{7.8.0.684} [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Aether II{Alpha v1.0.1} [Aether II] (aether_1.5.2_1.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
MainMenuAPI{1.0.0} [Main Menu API] (aether_1.5.2_1.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Profiler Position: N/A (disabled)
Vec3 Pool Size: 287 (16072 bytes; 0 MB) allocated, 287 (16072 bytes; 0 MB) used
Player Count: 1 / 8; [EntityPlayerMP['iv230'/176, l='Aether II', x=104,50, y=70,00, z=248,50]]
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'

java.lang.ClassCastException: net.minecraft.entity.player.EntityPlayerMP cannot be cast to net.aetherteam.playercore_api.cores.PlayerCoreServer
at net.aetherteam.aether.Aether.getServerPlayer(Aether.java:552)
at net.aetherteam.aether.AetherPlayerTracker.onPlayerLogin(AetherPlayerTracker.java:81)
at cpw.mods.fml.common.registry.GameRegistry.onPlayerLogin(GameRegistry.java:354)
at cpw.mods.fml.common.network.FMLNetworkHandler.handlePlayerLogin(FMLNetworkHandler.java:294)
at net.minecraft.server.management.ServerConfigurationManager.func_72355_a(ServerConfigurationManager.java:150)
at net.minecraft.server.integrated.IntegratedServerListenThread.func_71747_b(IntegratedServerListenThread.java:97)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:675)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:571)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:127)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:469)
at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)
--- END ERROR REPORT 368d13f7 ----------

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Merci de bien vouloir m'aider ;)