Hi I have a 10yr old SB gelding. He has been broken in for quite some time and is good to ride etc.. My problem is that once on the lunge line all he wants to do is trott. I can get him to canter but in either trot or canter it is hard to get him to stop straight away regardless if I'm standing still or not. I have had him for a few months now and am not able to get him to just walk. What can I do to get him just to relax and walk on a circle?