Bukkit

What steps will reproduce the problem?
1. Create a region, set the gamemode flag to creative
2. Realize AutoDep is not working and everyone in that region now has creative, not just players in AutoDeop config file
3. Change gamemode flag to survival
4. Crash and burn

What is the expected output? What do you see instead?
It should honor the configuration file

What version of the product are you using?
AutoDeop 1.0
Spigot v1.7.2 build 1171

Do you have an error log of what happened?
[13:31:05] [Server thread/INFO]: owner issued server command: /region flag spawn gamemode survival
[13:31:13] [Server thread/ERROR]: Could not pass event PlayerGameModeChangeEvent to AutoDeOp v1.0
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427) ~[spigot.jar:git-Spigot-1171]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-1171]
    at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:30) ~[spigot.jar:git-Spigot-1171]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:478) ~[spigot.jar:git-Spigot-1171]

Please provide any additional information below.

The plugin makes all players stay in the default gamemode, which in your case looks to be creative.