You can read that, right? It says that you're not allowed here. Because you're obviously not a Gryffindor. And if you are, well, SOMEONE wasn't paying attention when the password went out. Join the queue and I'll let you in.
If you think you belong here, ickle firstie, then go get yourself sorted. We'll see if you're really stout of heart or not.
I'm not kidding. Don't think we're above jinxing you.