If you click the forgot password link the site generates a new one for you, that is completely normal. You can alter this password again yourself after logging in (
http://www.msgplus.net/MyPlus/My-Plus!/My-Profile?page=credentials).
Give it a go again today by clicking the forgot password link again and try to log in again with that one. Should you still experience problems pm me your registration name/nick and email address you registered with and I'll have a look.