Do you have anti-virus? Like, for example, Norton will block it and remove it from your computer as well. For that you just go into the settings and disable firewall and anti-virus for like an hour when you're playing, and if it stops you in the middle extend it.
Also, I can't connect right now either. I haven't been able to log in (I haven't checked in like 20 minutes, but it wasn't working) to the server.