Make him cross it, over and over. Don't do any other pattern.
Warm him up, and make that the ONE and ONLY obstacle until he gets it. If he jumps it, great. Let him take 3 or 4 steps as a semi-reward and stop. Count to "5-mississippi" and turn him around, and calmly and collectively ask for it again. Do it back and forth, over and over, until it just wears him out. He will eventually rush over it at a trot instead of jump, then at a walk. Once he walks over it, stop him half way and let him rest over it.
If he is STILL struggling, make him go forward over it, and make him back over it. Once he's calm by it, call it a day. Even if it only takes 10 minutes, call it a day, and let him have the rest and think about it. Just spend the rest of your visit grooming and loving.
What ever you do, when he is spazzing out, you can't get frustrated. Just calmly ask. Don't keep it at the front of your mind that he always has a problem with this, just pretend he is a new horse, and this is a new obstacle --- every time he balks at it. Set a reasonable goal for the day, and don't accept anything less than perfect.
And too... when you're trying to get him to stop JUMPING over it, halt him before he even gets his weight redistributed to jump. You'll feel him rock back on his hocks, loading up, just crank on him a little and change his mind.
Last edited by westonsma; 06-14-2010 at 11:33 AM.