SharedObject data loss after reopening my ios app

Hi, I'm developing an app for ios devices and when I tested it on my iPhone the high-score data is lost everytime I restart (close and reopen) the application.

var shared: SharedObject = SharedObject.getLocal("myRecordObject");
if (shared.data.score) {
    record = shared.data.score;
}
scoreBar.recordField.text = record.toString();

.

.

.

function gameOver() {
.
.
.
    if (score > record) {
        record = score;
        shared.data.record = record;
        shared.flush();
        scoreBar.recordField.text = record.toString();
        scoreBar.adjust();
    }
}