My installation is a new Mercury updated to v.07. Futaba R6303SB receivers with 18MZ tx. I have attempted to set up the orientation with the RF on and off, the elevator and rudder servos plugged into the Mercury and not plugged in, and have been unable to set the orientation. I've tipped the nose of the jet up approximately 45 degrees and kept it still in that position for several minutes and receive no bars. What do I need to do to get successful orientation?