Why does Play action fail with "no suitable driver found" with Slick and PostgreSQL?

I'm writing a Scala web app using Play Framework 2.1.1 using a local Postgres database along with Slick 1.0.0, and I'm running into what seems to be a contradiction here.

This is the error I'm running into:

[SQLException: No suitable driver found for postgres://user:password@localhost:5432/postgres]
56  
57  def instance = Action {
58    Database.forURL("postgres://user:password@localhost:5432/postgres", driver = "org.postgresql.Driver") withSession {
59      val q = Retailer.map(_.name)
60      Ok(views.html.instance(q.list, newRForm))
61    }
62  }
63

Where user and password are respectively the username and password of the Postgres database.

In java error (No suitable driver found) I found:

1. You'll need to load the driver somewhere using Class.forName("org.postgresql.Driver");
2. You'll need the PostgreSQL driver's jar file in the classpath of your program.

In Application.scala I have the following block of code:

{
  println(ConfigFactory.load().getString("db.default.url"))
  println(Class.forName("org.postgresql.Driver"))
} 

Rerunning play compile results in:

(Server started, use Ctrl+D to stop and go back to the console...)

[info] play - database [default] connected at jdbc:postgresql://localhost:5432/postgres
[info] play - Application started (Dev)
postgres://user:password@localhost:5432/postgres
class org.postgresql.Driver
[error] application -

! @6ei1nhkop - Internal server error, for (GET) [/instance] ->

play.api.Application$$anon$1: Execution exception[[SQLException: No suitable driver found for jd