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Ok, so I was trying to set up an Aether II Forge server, but it kept crashing. Here's what the crash report says.





---- Minecraft Crash Report ----
// I blame Dinnerbone.

Time: 6/12/13 11:21 AM
Description: Exception in server tick loop

java.lang.RuntimeException:

========================================
Server Player API 1.5 can not be created!
----------------------------------------
Mandatory member method "ServerPlayerBase getServerPlayerBase(java.lang.String)" not found in class "net.minecraft.entity.player.EntityPlayerMP".
There are two scenarios this can happen:
* The file "net\minecraft\entity\player\EntityPlayerMP.class" of Player API universal has been replaced by a file of the same name but a different source.
Install Player API universal again to fix this specific problem.
* Player API universal has been installed in the "mods" folder.
Deinstall Player API universal and install it again following the installation instructions in the readme file.
========================================

at ServerPlayerAPI.register(ServerPlayerAPI.java:84)
at ServerPlayerAPI.register(ServerPlayerAPI.java:35)
at ServerPlayerAPI.register(ServerPlayerAPI.java:28)
at net.aetherteam.aether.CommonProxy.registerPlayerAPI(CommonProxy.java:50)
at net.aetherteam.aether.Aether.load(Aether.java:183)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:515)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:165)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:98)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:689)
at cpw.mods.fml.server.FMLServerHandler.finishServerLoading(FMLServerHandler.java:93)
at cpw.mods.fml.common.FMLCommonHandler.onServerStarted(FMLCommonHandler.java:357)
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:140)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:429)
at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)
Caused by: java.lang.NoSuchMethodException: net.minecraft.entity.player.EntityPlayerMP.getServerPlayerBase(java.lang.String)
at java.lang.Class.getMethod(Unknown Source)
at ServerPlayerAPI.register(ServerPlayerAPI.java:54)
... 35 more


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

-- System Details --
Details:
Minecraft Version: 1.5.1
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_03, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 939487200 bytes (895 MB) / 1029046272 bytes (981 MB) up to 1029046272 bytes (981 MB)
JVM Flags: 2 total; -Xmx1024M -Xms1024M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v7.44 FML v5.1.8.611 Minecraft Forge 7.7.1.611 5 mods loaded, 5 mods active
mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized
FML [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
Forge [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
Aether II [Aether II] (AetherII_Alpha_v1.0.2_MC1.5.1.zip) Unloaded->Constructed->Pre-initialized->Errored
MainMenuAPI [Main Menu API] (AetherII_Alpha_v1.0.2_MC1.5.1.zip) Unloaded->Constructed->Pre-initialized->Initialized
Profiler Position: N/A (disabled)
Is Modded: Definitely; Server brand changed to 'fml'
Type: Dedicated Server (map_server.txt)


I was told to set it up this way. If anyone knows how to fix the issue, please help. If anyone has the same problem, I hope you come acoss the answer. Have a nice day!

You are using mods. Maybe they are the reason.

You have put the player api in the mods folder, you need to murge it with the server .jar file like you did forge.

You might just be missing the PlayerAPI mod. search for it in the mods area,download and put it in the mods folder or copy the files into the .jar file.