mental attitude problems with racehorses

Question
I have a 4yr old filly in training.Two trainers rate her at 80-90( flat sprinter)from home gallops etc. She won her maiden 6f 1st time out at 3 then 4th in big field sprint but bumped etc etc and has never run a race since (about10runs)She has dropped from potential listed class to banded - 48. Nothing wrong physically any suggestions to help her mental state of mind at the races.I do not want to cover her yet I have her dam as a broodmare and she is 1st foal so would like to put some more on the pedigree to help the other prodigy.The 2nd trainer has tried the usual and she seems very happy and well at home. Any suggestions welcome !Thankyou Sally

Answer
I'M SORRY, BUT THERE ARE JUST TOO MANY VARIABLES TO GETTING A HORSE TO DO IT'S BEST.THEY ARE ALL DIFFERENT.ONE MIGHT WANT TO WALK INTO A RACE AND THE NEXT NEEDS TO BREEZE THE MORNING OF THE RACE, OR IT COULD BE ANYTHING IN BETWEEN.

JUST AS A SHOT IN THE DARK, HAS SHE BEEN TREATED FOR ULCERS?