Bukkit

What steps will reproduce the problem?
1. Attempted to use on craftbukkit-1.7.9-R0.3-20140603.002405-1 .
2. Plugins are : Bankcraft, BOSEconomy, Cannons, CraftableHorseArmor, Essentials, Gates, GroupManager, iSail, mcMMO, Multiverse-Core, Multiverse-Inventories, Multiverse-NetherPortals, Multiverse-Portals, Multiverse-SignPortals, MythicDrops, PluginMetrics, QuantumConnectors, RadioTowers, Scribe, SimpleBackpacks, Updater, Vault, WgCommandRegions, WomOres, WorldEdit, and WorldGuard. (all are updated to the latest version.
3. Run Server, and try to create a ship.

What is the expected output? I expected to have a ship.  What do you see instead? Long error on server console Below is the full error:
[15:42:31] [Server thread/INFO]: [WorldEdit] Using external NmsBlock for this version: CBXNmsBlock_175_5xcompat
[15:42:52] [Server thread/ERROR]: Could not pass event SignChangeEvent to iSail v0.98
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:294) ~[craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:501) [craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:486) [craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at net.minecraft.server.v1_7_R3.PlayerConnection.a(PlayerConnection.java:1586) [craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at net.minecraft.server.v1_7_R3.PacketPlayInUpdateSign.a(SourceFile:48) [craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at net.minecraft.server.v1_7_R3.PacketPlayInUpdateSign.handle(SourceFile:9) [craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at net.minecraft.server.v1_7_R3.NetworkManager.a(NetworkManager.java:157) [craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at net.minecraft.server.v1_7_R3.ServerConnection.c(SourceFile:134) [craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:667) [craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:260) [craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:558) [craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:469) [craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
Caused by: java.lang.IllegalArgumentException: Plugin already initialized!
    at org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader.java:98) ~[craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:66) ~[craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at iSail.iSail.<init>(iSail.java:55) ~[?:?]
    at iSail.Ship.<init>(Ship.java:107) ~[?:?]
    at iSail.iSail.signsCreating(iSail.java:1765) ~[?:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_60]
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_60]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_60]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_60]
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:292) ~[craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    ... 13 more
Caused by: java.lang.IllegalStateException: Initial initialization
    at org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader.java:101) ~[craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:66) ~[craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at iSail.iSail.<init>(iSail.java:55) ~[?:?]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.7.0_60]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.7.0_60]
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.7.0_60]
    at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[?:1.7.0_60]
    at java.lang.Class.newInstance(Unknown Source) ~[?:1.7.0_60]
    at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:52) ~[craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:127) ~[craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:328) ~[craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) ~[craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at org.bukkit.craftbukkit.v1_7_R3.CraftServer.loadPlugins(CraftServer.java:355) ~[craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at org.bukkit.craftbukkit.v1_7_R3.CraftServer.<init>(CraftServer.java:317) ~[craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at net.minecraft.server.v1_7_R3.PlayerList.<init>(PlayerList.java:68) ~[craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at net.minecraft.server.v1_7_R3.DedicatedPlayerList.<init>(SourceFile:14) ~[craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at net.minecraft.server.v1_7_R3.DedicatedServer.init(DedicatedServer.java:126) ~[craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:436) ~[craftbukkit-1.7.9-R0.3-20140603.002405-1.jar:git-Bukkit-1.7.9-R0.2-1-ga6e0bfd-b3095jnks]
    ... 1 more
[15:46:36] [Server thread/INFO]: [Bankcraft] Granted interest to all players.
[15:46:38] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2269ms behind, skipping 45 tick(s)
[15:47:16] [Server thread/INFO]: Jgames666 lost connection: Disconnected
[15:47:16] [Server thread/INFO]: Jgames666 left the game.
[15:51:24] [pool-4-thread-1/INFO]: GroupManager - INFO -  Data files refreshed.

What version of the product are you using? Isail v0.98

If there is any fix you can think of, I'll happily answer any questions you have. Also, i have a somewhat working knowledge of java, so i can try things for you if you need help testing something. my personal email is [email protected] . Sometimes may take a day to answer I work a lot, so sometimes can't answer right away.

Thanks, -Jeff