[18:26:10] [Server thread/ERROR]: Could not load 'plugins/CustomDrops.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: Cannot find main class `com.negafinity.customdrops.CustomDrops'
 at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:191) ~[PluginClassLoader.class:1.7.10-1448.133]
 at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:145) ~[JavaPluginLoader.class:1.7.10-1448.133]
 at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:334) ~[SimplePluginManager.class:1.7.10-1448.133]
 at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:256) [SimplePluginManager.class:1.7.10-1448.133]
 at org.bukkit.craftbukkit.v1_7_R4.CraftServer.loadPlugins(CraftServer.java:320) [CraftServer.class:1.7.10-1448.133]
 at net.minecraft.world.storage.SaveHandler.initBukkitData(SaveHandler.java:461) [ayq.class:?]
 at net.minecraft.world.storage.SaveHandler.func_75757_d(SaveHandler.java:137) [ayq.class:?]
 at net.minecraft.world.World.<init>(World.java:360) [ahb.class:?]
 at net.minecraft.world.WorldServer.<init>(WorldServer.java:158) [mt.class:?]
 at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:367) [MinecraftServer.class:?]
 at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:336) [lt.class:?]
 at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:631) [MinecraftServer.class:?]
 at java.lang.Thread.run(Thread.java:745) [?:1.7.0_76]
Caused by: java.lang.ClassNotFoundException: Failed to remap class com.negafinity.customdrops.CustomDrops
 at org.bukkit.plugin.java.PluginClassLoader.remappedFindClass(PluginClassLoader.java:488) ~[PluginClassLoader.class:1.7.10-1448.133]
 at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:409) ~[PluginClassLoader.class:1.7.10-1448.133]
 at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:211) ~[PluginClassLoader.class:1.7.10-1448.133]
 at java.lang.ClassLoader.loadClass(ClassLoader.java:425) ~[?:1.7.0_76]
 at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ~[?:1.7.0_76]
 at java.lang.Class.forName0(Native Method) ~[?:1.7.0_76]
 at java.lang.Class.forName(Class.java:274) ~[?:1.7.0_76]
 at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:189) ~[PluginClassLoader.class:1.7.10-1448.133]
 ... 12 more