How to pass flash data from controller to view with Play! framework

I've been plowing through play! so far with a few bumps in the learning curve. Right now I am unable to pass flash data from the controller to the view, which at first I thought was a trivial task, or at least it should be.

Here's what I have right now:

I have a main layout: application.scala.html

I have a view that goes in the layout: login.scala.html

and I have my controller and method: UX.authenticate() - I want this to provide flash data to the view depending on the outcome of the login attempt (successful vs fail)

This is my code in my controller method:

def authenticate = Action { implicit request =>
        val (email, password) = User.login.bindFromRequest.get
        // Validation
        // -- Make sure nothing is empty
        if(email.isEmpty || password.isEmpty) {
            flash + ("message" -> "Fields cannot be empty") + ("state" -> "error")
            Redirect(routes.UX.login())
        }
        // -- Make sure email address entered is a service email
        val domain = email.split("@")
        if(domain(1) != "example.com" || !"""(\w+)@([\w\.]+)""".r.unapplySeq(email).isDefined) {
            flash + ("message" -> "You are not permitted to access this service") + ("state" -> "error")
            Redirect(routes.UX.login())
        } else {
            // Attempt login
            if(AuthHelper.login(email, password)) {
                // Login successful
                val user = User.findByEmail(email)
                flash + ("message" -> "Login successful") + ("state" -> "success")
                Redirect(routes.UX.manager()).withSession(
                  session + (
                    "user"      -> user.id.toString
                  )
                )
            } else {
                // Bad login
                flash + ("message" -> "Login failed") + ("state" -> "error")
                Redirect(routes.UX.login())
            }
        }