Include external files/ database connection?

[Cordain]

Please help. I have a lua script that uses luaSQL for database connection. It works as a stand alone lua script but not when used in an addon.

example code:

mysql = require "libmysql.mysql"
local env  = mysql.mysql()
local conn = env:connect('DB-NAME','DB-USERNAME,'PASSWORD','DB-IP-ADDRESS,'PORT NUMBER')

it throws an error "Function expected instead of nil" at this line

mysql = require "libmysql.mysql"

Anyone have suggestions on connecting to external database?

an alternative would be to have addon POST to a my server side php file to handle database update but I have no idea how to do this either.