Im not a coder after installing the vault plugin to my bukkit server and typing the commands /vault-convert it will say "You don't have permission to use that command -You must have 2 economies loaded to convert"

How to use this? Please I need help?!

vault-convert is only for doing conversions when your economy doesn't support it natively. It's a last-resort and may not fully work. What are you expecting vault-convert to do?