I just got my new Sidewinder Sv2 all mounted up and ready to go with my stock brushless VXL motor. When I hook it up with one battery pack or two in parallel connection, it works great. When I try and hook both batteries in series it turns on and connects to my transmitter okay, but I don't have any movement. Just a red light flashing. Servo still responds fine, just no go. I've tried changing settings when I hook it up to my computer with the Castle Link program, but still no change.
Any suggestions? Anyone have any ideas or solutions? I'm new to the Castle products and can't find a fix.