And,,,, here is another option.
Sometimes these kids just want attention, so try putting her on her own until she does it. Yelling may get her to do it because she is getting all that extra attention that she thrives for, perhaps the other coaches have already caught onto this.. Typically kids who really have fear issues respond to yelling with even more fear issues, by losing other skills etc (you can get them to go, but eventually is backfires)... I am not saying don't work with her, but mind the amount of attention she gets and direct more of it towards the kids who are succeeding. This may actually help her. In other words, attention seekers can be fixed, fear issues are case by case and usually end up stopping a gymnast in level 8 or 9.