just found this-

Ken, you are right, the T6 EXA is FM (PPM) only, although I have never seen one, take the receiver back to the shop and explain. (Print off the table below). The Futaba website shows the differences. Look at http://www.futaba-rc.com/radios/feature-compare.html I think that Futaba must have made this transmitter for a short time then added the PCM system to it and called it 6EXA Super and/or 6EXAP which are very popular models.

so im on ppm mode, but the reciever just flashes for a few seconds then dead.