Frank if memory serves me, you cannot scan the fire tone out codes. You need to set it on one code and let it wait there. You cannot (yet) be scanning as you would normally, and have a FTO setting at the same time.
You might find this useful - it's from the Western Pa scanner wiki (yeah, there's another scanner-related wiki out there...)
http://www.wpascanner.com/wiki/index...dware:Tone_Out
73 Mike