Plugin so chest can only be used once.

On my server i have a parkour and i was wondering what the plugin is called so a chest can only be used once.

For example:
A person finishes a level in a parkour and they win a diamond and they can't use the chest again, But other users who havn't completed that level still have a diamond waiting for them in their chest.

(Sorry if that example was confusing)

 

I have not personally used this plugin, but it may have what you are looking for.

http://dev.bukkit.org/server-mods/phatloots/

 

PhatLoot doesn't work for me, internal errors occur.

 

You should report those errors to the authors, as they probably aren't aware of any issues. I usually ain't, anyway.

 

Will do.
Also when i get a error does everyone get it or just me.

 

Depends on configurations, OS, other plugins, CB version, java version, I could go on for some time

 

You can also try this:
http://dev.bukkit.org/server-mods/treasurechest/