External DB?

[eluser]danmontgomery[/eluser]
There's not. But you don't need to add :3306 for mysql, as it's the default port (although doing so makes no difference).

Again, I would check settings on the DB server. The server may be rejecting all external connections to that port, or you may just need to add permissions for the user. Your host would be able to tell you things like this.