It's timing and maybe stamina/endurance. The more practice she gets with her music, the better. You'll notice that higher level skaters use the same jump entrances over and over again regardless of the music or program. It's what they have learned that works for them. Unfortunately, at the lower levels, it's a constant learning process until they find an entrance or pattern or footwork that actually works nicely for them.
As far as what you can say to her.....the more she practices her program, the easier it will get. It's one thing to knock off jump after jump after jump on a practice session. It's another thing to knock off jump after jump after jump in a program with intricate choreography! Throw in burning legs, and reduced lung capacity at the end and you'll see why it's different! With all of that in mind, the skater starts to get frazzled and winded and the first thing to go is technique. When technique goes, so goes the jump!
If it really is that she's just distracted by the music, then she needs to listen to her music over and over again until it's not a distraction.