Align GP780 Can't get a solid green
 

I'm in the final stages of setting up my new Trex 700 and The gyro setup goes smoothly through the limit settings. After pressing set to get to the delay settings the rudder is very smooth. But after setting the delay and see a green flashing light I hit set and the main light goes to solid red and the rudder is jumpy again. I've checked the gain on the TX and everything is where it should be. I must be missing something but I dunno what!

Thanx in advance,

JB