C:\Users\Nick\Desktop>cd C:\Users\Nick\Downloads\MCSERVER\Planes

C:\Users\Nick\Downloads\MCSERVER\Planes>java -Xmx1024M -Xms1024M -jar minecraft_
server.jar nogui
161 recipes
17 achievements
ModLoader Server Beta 1.8.1 Initializing...
2011-10-16 17:17:31 [INFO] ModLoader Server Beta 1.8.1 Initializing...
2011-10-16 17:17:31 [INFO] ModLoaderMP Beta 1.8.1 Initialized
ModLoaderMP Beta 1.8.1 Initialized
java.lang.ClassNotFoundException: PlayerAPI
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Unknown Source)
        at mod_Planes.<init>(mod_Planes.java:56)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou
rce)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at java.lang.Class.newInstance0(Unknown Source)
        at java.lang.Class.newInstance(Unknown Source)
        at ModLoader.addMod(ModLoader.java:104)
        at ModLoader.readFromClassPath(ModLoader.java:903)
        at ModLoader.init(ModLoader.java:604)
        at ModLoader.Init(ModLoader.java:1269)
        at net.minecraft.server.MinecraftServer.c(MinecraftServer.java:74)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:262)
        at ce.run(SourceFile:417)
mod_Planes added plane : BF109
mod_Planes added plane : Biplane
mod_Planes added plane : Camel
mod_Planes added plane : Fokker
mod_Planes added plane : Mustang
mod_Planes added plane : Spitfire
mod_Planes added plane : TwoSeaterBiplane
Mod Loaded: mod_Planes 1.8.1v16
2011-10-16 17:17:32 [INFO] Mod Loaded: mod_Planes 1.8.1v16
Done.
2011-10-16 17:17:32 [INFO] Starting minecraft server version Beta 1.8.1
2011-10-16 17:17:32 [INFO] Loading properties
2011-10-16 17:17:32 [INFO] Starting Minecraft server on *:25565
2011-10-16 17:17:32 [INFO] Preparing level "world"
2011-10-16 17:17:32 [INFO] Default game type: 1
2011-10-16 17:17:32 [INFO] Preparing start region for level 0
2011-10-16 17:17:33 [INFO] Preparing spawn area: 89%
2011-10-16 17:17:33 [INFO] Preparing start region for level 1
2011-10-16 17:17:34 [INFO] Preparing spawn area: 81%
2011-10-16 17:17:34 [INFO] Done (2298329536ns)! For help, type "help" or "?"