Nostalrius Begins - Quality wow vanilla realm (1.12)

I have downloaded and configured the client as described in the "Beginners" thread. I have been only able to log in once, on 1st March, but it was so crowded and laggy that I decided I'll wait a bit with playing.

Now (yesterday and today) all I'm getting is "Unable to connect" message.

What gives?

Same problem for me..