You want an even four beat gait. It should be 1 . . 2 . . 3 . . 4 not 1,2 . . 3,4 like the stepping pace does. You need to slow him down. First, dog walk him. Let your reins out until he lowers his head as low as he wants it. Walk him in this position for a few days. The dog walk will build a gear box in your horse's hindquarters. After you have established a good, impulsive dog walk, speed him up to a flat walk. All gaited horses should be able to perform the flat walk. Without the flat walk you have no gait. A good way to build a good flat walk is to take him uphill doing the flat walk often. After building both the dog walk and flat walk, you may then start to gait him. Remember to build him up very slowly. This will establish an excellent, impulsive gait.