Wa8,
I set up my plane with two elevator servos. You have to set up the Ailevator function and use channels 1 and six (or is it 2 and six) I'll have to check my plane. It is on page 49 of your manual.... if you have it. If not, let me know and I can fax it.
I found this on Futaba's web site....
http://www.futaba-rc.com/faq/faq-9c-q512.html