Hello,
I am using Vault in a Sentry sells plugin, which , because it is selling the sentry, need an interaction with money. Here is the code:
http://pastebin.com/80M1mB9d
And the error:
http://pastebin.com/9yQmNH5X

I import Vault on my project, it is on my plugin folder, but the plugin can't detect it. And Vauld is in green in the /pl

Thanks for your Help,
Sneling.

Make sure you have Vault AND an Economy plugin installed, Vault does not provide an economy, only the interface for interacting with other economies.