[Persistence Question] Not a registered ebean entity?

I am having problems with persistence... whenever I try to put something in the database I get this error in th console

Code:

2011-05-20 21:14:18 [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'iop' in plugin iOP v0.5
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:37)
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:85)
    at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:278)
    at net.minecraft.server.NetServerHandler.handleCommand(NetServerHandler.java:682)
    at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:645)
    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:639)
    at net.minecraft.server.Packet3Chat.a(Packet3Chat.java:32)
    at net.minecraft.server.NetworkManager.a(NetworkManager.java:196)
    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:75)
    at net.minecraft.server.NetworkListenThread.a(SourceFile:100)
    at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:372)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:287)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:394)
Caused by: javax.persistence.PersistenceException: com.scswc.shadrxninga.iop.iOPDatabase is NOT an Entity Bean registered with this server?
    at com.avaje.ebeaninternal.server.core.DefaultServer.createQuery(DefaultServer.java:1031)
    at com.avaje.ebeaninternal.server.core.DefaultServer.createQuery(DefaultServer.java:988)
    at com.avaje.ebeaninternal.server.core.DefaultServer.find(DefaultServer.java:1024)
    at com.scswc.shadrxninga.iop.iOP.onCommand(iOP.java:113)
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:35)
    ... 12 more

I have ebeans.properties in the main server folder
database is set to true in the plugin.yml
I have deleted the empty database several times

Here is my main class
http://pastebin.com/DmxqLDe6
and my persistence class
http://pastebin.com/tGPi2BZM

I have looked at captainawsome7 thread about this and could not find the answer...
What am I doing wrong

@Sammy

 

Change the @NotNull to @NotEmpty for all your strings (and make sure they aren't empty).

Also, don't hardcode the path to your yml file, use this.getDataFolder().

Let me know if that helps.

 

Code:

            @Override
            public List<Class<?>> getDatabaseClasses() {
                List<Class<?>> list = new ArrayList<Class<?>>();
                list.add(iOP.class);
                return list;
            }
            {

Isn't the name of the class iOPDatabase and not iOP?