Hi everyone, I have an old GB Tiger 60 that I pulled back off the shelf after a year and a half of just sitting. I pulled the battery and put a charged one in it and turn in on with my transmitter and the servos sit there jittering. I put my transmitter right beside the plane, the receiver antenna was straight laying outside of the plane. I had pulled the receiver to use it on another plane. I'm useing Futaba S3004's in the plane. I've never had any problems that I can recall with these servos. Any ideas what might be causing this?