horse jumper I agree your post is a bit confusing. can you give us a better timeline of what type of training you have been doing? I also have a horse and we have a pony who both rush fences. I have found a couple of things that help. I lunge my horse first (I know many don't agree but for my horse its mandatory at this point) this lets her get any silly energy out and makes her realize its time to work.
Then she has to be worked a lot on the flat before we look at jumps. Lots of trotting, transitions, etc. Put a ground pole about 9 feet in front and behind a small cross rail. I don't even start trotting her until just before the first ground pole when I first start out. This has helped a lot. Also after the jump halt, circle, etc. Also make sure that you are anticipating her rushing, I know its hard but I have to remind myself to take a deep breathe, relax and think calm, not tense as we approach the fence. I also saw a George Morris clinic where he had them jumping a horse in a circle, three small jumps set up in a circle, I will see if I can find it on youtube. Jumping in a circle cuts down on their anticipation of the jump apparently, I haven't tried it yet.
Is your horse very forward on the flat? (mine sure is but she is a bit younger)