Replying to Binding help

so im going down the "beginner" terrain park at my local moutain. i go off this small little kicker, 180, land and my ski just falls off and keeps going? i see that my brake broke off, and im wondering how it happened, i landed it just fine, and my brake broke. So what im trying to say is, that this is my first year sking, and im progressing fast.  I just got my twin tips for christmas this year, and im sorta pissed the brake broke. how much is it to fix it? how much is a new brake generaly? if you could help me out id appreciate it.