jjackson I would go into your LHS they always have a few blades in for repair bring your radio so you can swap out the crystal with a transmitter they have in there and you can see if its the problem that way,If thats it you hae to send it off for repair ,I recently bought real flight G3 and the right stick on the tx wasnt working ,Sent it offto GreatPlanes and they replaced it,the point I am making is yes the tx sticks go bad .
You can probably pick up a new one on e-bay cheep if You arnt still under warantee ,In fack I will be putting myne on there soon (Just Bought a futoba 7chp on there for $110,any way good luck with it