[d10]

This may be equivalent to the "Do you have your computer plugged in?" tech support question, but is your domain name linked to anything? As in do you have a server somewhere, or space on someone else's server, or do you just have a registered name? When you say can't connect with the proper username and password are you getting far enough to where your computer actually sends out your username and password or are you not even able to connect with your server? If you can't connect, try using the IP address of your server. If you don't have an IP address, refer back to the first question.