First of all, What operating system are you using? If Vista, are you running it with full administrator priveleges?
Do you have a firewall installed - If so, have you allowed cm2 to have full access through it?
Have you upgraded all security patches for windows?
Have you tried re-entering your username/password under options?
Do you have firefox installed? Some people have reported problems with this installed - search the forums for firefox to find solutions.
Try using IE to connect directly to the DLS to ensure the ip address is being resolved -
http://www.auran.com/TRS2004/DLS.php
Start with these and let us know how it goes!
Bricey