I installed and activated DemiGod (retail copy) with the supplied key.  I got the latest update, but when I attempt to logon to Demigod Internet multiplayer with my Impulse account, it says something like "invalid username or password".  I use the same username/password to logon to Impulse, and the forums, but it doesn't work in DemiGod.  Any ideas?

Because of this, my impression of Demigod isn't great at this point.  Hopefully, someone has an idea and can help me with this.

Also, why can't I change my email address?  The email address is an old one that I had 5 years ago, but I don't see any way to change this.  This is a basic operation that should be permitted, yet I see no way to change it.