Check your connection or call the provider, it happend to me, i sent support ticket, I couldnt connect for few days, and than I thought " Hey I could call my provider" (doh:P) and they told me they know about it, its their problem and it will be resolved soon, and it did. So try that
These error codes indicates a connection error. This means the connection between your PC and the server was interrupted, or never established. The problem may be on your system (firewall, router, modem, etc.), with your ISP or a connection problem at the server.
That's from the official wiki. I suggest you all check out.