Not quite sure if this was covered already here: the two methods to connect are
a) both sides login via mySteinberg, one locates friend in the friends list and double clicks to connect. Do not click the ID button in this case.
b) Do not log in with mySteinberg but have studio click ID button, have Performer know the number shown and type it in his field and click connect. Performer must also not login with this method, just type the number then connect.