Connection terminated: Duplicate Login ?
For every YF account only one simultaneous login is allowed, meaning that you can only use your account on one PC at a time. When you try to log in a second time while your other connection is still connected, the earlier connection will be terminated and the client will show a “Duplicate Login” error message. This message can also occur in rare cases where the YF client is having trouble shutting down a previous session on the server. Exiting the YF client and restarting it will solve the issue.