Brian: I have viewed the link provided in your reply, but I am a CPA, not a computer expert. So am I correct that if I have no land line, and there is any problem with my cell phone, I will be unable to open ProSeries until the problem with my cell phone is resolved? This situation may be unlikely, but it could be serious and costly if there is a time-critical deadline that can't be met because of my inability to log on.