Problem z pluginem na drop

[EnglishPhilips]

Witam,

 

mam problem z edytowanym przez Xierip'a pluginem na drop MH-DROP logi:

[20:52:30] [Server thread/ERROR]: Could not load 'plugins\MH-Drop.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.ClassFormatError: Incompatible magic value 791289888 in class file pl/myhard/drop_old/commands/StoneCommand
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:137) ~[Silnik.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:313) ~[Silnik.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:236) [Silnik.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugins(CraftServer.java:350) [Silnik.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at org.bukkit.craftbukkit.v1_7_R1.CraftServer.<init>(CraftServer.java:312) [Silnik.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at net.minecraft.server.v1_7_R1.PlayerList.<init>(PlayerList.java:63) [Silnik.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at net.minecraft.server.v1_7_R1.DedicatedPlayerList.<init>(SourceFile:14) [Silnik.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.java:126) [Silnik.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:424) [Silnik.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [Silnik.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
Caused by: java.lang.ClassFormatError: Incompatible magic value 791289888 in class file pl/myhard/drop_old/commands/StoneCommand
	at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_66]
	at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.8.0_66]
	at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.8.0_66]
	at java.net.URLClassLoader.defineClass(Unknown Source) ~[?:1.8.0_66]
	at java.net.URLClassLoader.access$100(Unknown Source) ~[?:1.8.0_66]
	at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.8.0_66]
	at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.8.0_66]
	at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_66]
	at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_66]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:77) ~[Silnik.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62) ~[Silnik.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_66]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_66]
	at java.lang.Class.forName0(Native Method) ~[?:1.8.0_66]
	at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_66]
	at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:40) ~[Silnik.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133) ~[Silnik.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
	... 9 more

Pomorze ktoś? Byłbym bardzo wdzięczny.